How to improve in Chess ? Is it better to simply playing games or to start learning theory and puzzles and then playing ranked games ?
Like most things, improvement requires lots of study, practice and experience.
It is better to learn a good foundation and then layer more advanced concepts as you progress. While you are studying this, playing games and analyzing your own games is a constant. That is almost always going to be present.
I mostly got over 2000 rapid on chess.com by playing, analyzing and repeat for years. Of course, I solved many puzzles routinely and other things as well. You are already over 1200, so you probably already know what to do. What you did to reach 1200 is the same as 2000+...just layering more and more things gradually, but the learning process is basically the same.
Oh, of course I would also be remiss to not mention my own YouTube channel as well
https://www.youtube.com/@kesetokaiba/videos
How to improve in Chess ? Is it better to simply playing games or to start learning theory and puzzles and then playing ranked games ?