A good Chess System for Beginners?

Perhaps you would like the suggestions near the end of Yasser Seirawan's Winning Chess Openings.
https://www.chess.com/article/view/book-review-winning-chess-openings
https://web.archive.org/web/20140627132508/http://www.chesscafe.com/text/hansen173.pdf

Focus on the basics in your games before worrying about systems and tactical middle games. You don't develop pieces, don't control the centre, continuously leave your prices undefended and don't recognise your opponent's undefended prices.

Chess Openings Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond
https://www.chess.com/blog/RussBell
some "System" chess openings...
http://www.chessfornovices.com/chessopeningsystems-specificstrategy.html
https://www.chess.com/forum/view/for-beginners/ten-system-openings
and of course, the currently fashionable London System for White...
https://www.chessable.com/chess-openings/s/london
https://www.chess.com/blog/RussBell/the-london-system
As White, as a flexible opening system that can be played against most lines that Black can respond with, check out the King's Indian Attack....
https://www.youtube.com/watch?v=HL3BsUBjkdI
https://www.youtube.com/watch?v=JkuVZZw1vPM
https://www.youtube.com/watch?v=j3EynZPiSpQ
https://www.chessable.com/chess-openings/s/king's%20indian%20attack
As Black against 1. e4 you might consider the Scandinavian Defense 1.e4 d5......as it's "easier" than most other defenses to 1.e4 to learn, though not particularly aggressive or dynamic, but nevertheless playable....I recommend either the 3...Qd6 or the 3...Qd8 variations.
https://www.chessable.com/chess-openings/s/scandinavian
https://www.youtube.com/watch?v=Gb38tkOMuxc
As Black against 1.d4, you might check out the Dutch Defense - one of "easier" defenses to learn. There are three primary variations for Black to choose from, all of which are generally aggressive, but to different degrees - the Leningrad (sharp, tactical), and the Stonewall (solid, maneuvering), and the Classical (flexible, between the other two)...
You may find the Leningrad attractive due to the highly tactical positions that quickly arise, however I prefer and generally recommend either the Classical or the Stonewall variations, as they are less risky.....but check out all three to see which suits your style...
Introduction to the Leningrad Dutch...
https://www.youtube.com/watch?v=FC8y4RTKgow
Introduction to Classical and Stonewall Dutch...
https://www.youtube.com/watch?v=WhaKh3lxcGg
GM Simon Williams (aka 'GingerGM') on the Dutch Defense Classical Variation...which he is an expert on.....he has many videos on YouTube on this variation....and a couple of courses on Chessable.com....
https://www.youtube.com/watch?v=nRc294rgH_s
https://www.chessable.com/chess-openings/s/dutch
A 'delayed' Stonewall Dutch, nicely illustrating a typical, thematic kingside attack with this defense...
https://www.youtube.com/watch?v=Yeju7f1NDXo
By the way, there is also a White version of the Stonewall....called.....
The Stonewall Attack....
https://www.youtube.com/watch?v=P65XMmfK110
https://www.chess.com/blog/RussBell/stonewall-attack
other defenses for Black...
https://thechessworld.com/articles/openings/5-best-opening-systems-for-club-players-for-black/
"... For players with very limited experience, I recommend using openings in which the play can be clarified at an early stage, often with a degree of simplification. To accomplish this safely will take a little study, because you will have to get used to playing wiith open lines for both sides' pieces, but you can't eliminate risk entirely in the opening anyway. ... teachers all over the world suggest that inexperienced players begin with 1 e4. ... You will undoubtedly see the reply 1 ... e5 most often when playing at or near a beginner's level, ... After 2 Nf3, 2 ... Nc6 will occur in the bulk of your games. ... I recommend taking up the classical and instructive move 3 Bc4 at an early stage. Then, against 3 ... Bc5, it's thematic to try to establish the ideal centre by 4 c3 and 5 d4; after that, things can get complicated enough that you need to take a look at some theory and learn the basics; ... Of course, you can also play 1 d4 ... A solid and more-or-less universal set-up is 2 Nf3 and 3 Bf4, followed in most cases by 4 e3, 5 Be2 and 6 0-0. I'd rather see my students fight their way through open positions instead; however, if you're not getting out of the opening alive after 1 e4, this method of playing 1 d4 deserves consideration. ... a commonly suggested 'easy' repertoire for White with 1 Nf3 and the King's indian Attack ... doesn't lead to an open game or one with a clear plan for White. Furthermore, it encourages mechanical play. Similarly, teachers sometimes recommend the Colle System ..., which can also be played too automatically, and usually doesn't lead to an open position. For true beginners, the King's Indian Attack and Colle System have the benefit of offering a safe position that nearly guarantees passage to some kind of playable middlegame; they may be a reasonable alternative if other openings are too intimidating. But having gained even a small amount of experience, you really should switch to more open and less automatic play. ..." - IM John Watson in a section of his 2010 book, Mastering the Chess Openings, Volume 4
"... As Black, I think that [players with very limited experience] would do well … playing 1...e5 versus 1 e4 and 1...d5 versus 1 d4. … [After 1 d4 d5, if] White plays the most important move, 2 c4, inexperienced players might want to begin classically with 2...e6 followed by ...Nf6 and ...Be7 …" - IM John Watson (2010)

Since tactics and beginners are used in this post. I do puzzles and I seem to do better at identifying white tactics and advantages than I do black. Is there something I am missing or just more practice in the identification of the black strengths?

This is a bad idea, trust me. It will slow down your improvement since you will get accustomed to playing the same moves without much thinking over and over again. System openings are not tactical since they would not be system openings otherwise.

@kindaspongey had some nice suggestions as White. He didn't mention the Reti system though, which is very interesting. Or maybe the Veresov. As Black you might want to give 1...Nc6 a try. You can play it against everything. It's tactical too, as you like Everyman has got an interesting selection of books on it. This one is particularly interesting, as it offers you a complete system type repertoire for White and Black. Have fun playing!

Since OP really want a system, i recommend the Stonewall Attack and Defence. And Scandinavian defense to defend against e4.




Intro to the Black Lion....by GM Simon Williams (aka 'GingerGM') one of my favorite online chess instructors/presenters....
https://www.youtube.com/watch?v=7j12fhWid3g
https://www.amazon.com/Black-Lion-aggressive-Philidor-Williams/dp/3866815395/ref=sr_1_1?keywords=The+Black+Lion+-+an+aggressive+version+of+the+Philidor+Defense&qid=1576055115&s=books&sr=1-1
As the Black Lion is a variant of the Philidor Defense, it would seem natural to also check it and its variants out.....some relevant books....
The Black Lion: The Chess Predator's Choice Against Both 1.e4 and 1.d4 by Jerry Van Rekom & Leo Janssen
Play 1…d6 Against Everything by Erik Zude & Jörg Hickl
which is also available as a Chessable course...
https://www.chessable.com/play-1d6-against-everything/course/13376/
A Cunning Chess Opening for Black: Lure Your Opponent into the Philidor Swamp by Sergey Kasparov
Philidor Files by Christian Bauer
If you are interested in the London System, I recommend to first check out a less well known but effective variant of the London which is referred to, variously, as the Jobava London, or simply, Jobava System or Jobava Attack. In fact I'm thinking to make this my main opening as White (i.e., instead of the 'Standard" London, which had previously been my main opening as White). I was persuaded in this by (who else!) GMSimon Williams who is very enthusiastic about it. It seems to me to be very effective for White and reasonably easy to learn....
https://www.youtube.com/watch?v=bPLrXjQyNFQ
https://www.youtube.com/watch?v=jsWlRhhiDLs
https://www.youtube.com/watch?v=DGz2-LPQILo
GM Simon Williams' Jobava London courses on Chessable.com......he now recommends these courses as the most current and comprehensive of his instructional material on the Jobava...
https://www.chessable.com/chess-openings/s/london
There is currently very little instructional/tutorial material available on the Jobava, beyond YouTube videos and Simon Williams' (GingerGM) instructional materials (I will probably end up purchasing his the Chessable courses on the Jobava). The only book I know of (which I do own) and which (as far as I am aware) provides any kind of significant coverage of the Jobava is the following book which primarily covers the "Standard" London System, but where Chapter 8 is the subject of the Jobava System (referred to there as the Jobava Attack)....the book provides excellent coverage of the London System....I highly recommend it for all London System players...
The Agile London System by Alfonso Romero Holmes & Oscar de Prado...
https://www.amazon.com/Agile-London-System-Dynamic-Opening/dp/9056916890/ref=sr_1_1?crid=2S1LZ28L5RL4G&keywords=the+agile+london+system&qid=1576050034&s=books&sprefix=the+agile+lon%2Caps%2C191&sr=1-1
Another intro to Jobava System...on Jim's Chess Channel, YouTube...
https://www.youtube.com/watch?v=5joSsNpJ9qw
Finally, you might like to check out my blog article....
Introduction To The London System...
https://www.chess.com/blog/RussBell/the-london-system
On a different note....concerning 1.e4.......
As White, a system which can be played against many or even most of Black's responses is The King's Indian Attack.....I had mentioned this in one of my earlier posts in this thread.
As Black against 1.e4, there are many choices for responding as Black. But probably the easiest response to learn is the Scandinavian Defense. Again, I had mentioned this earlier.