here we go again

ok so I'm finally going to switch over to dark side. (e4) I was looking into the ruy lopez and evans gambit. Maybe the king's gambit. Can the king's and evans gambit be played at master levels and what do I need to know about them. Thanks

Timeless

They aren't played very much at master levels, but I think they are both fine to an extent, Boris Spasky used to paly the KG

Also, I was looking into the sicillan. Which varitions should I look into

Dragon or the najdorf are quite good, shevenshnikov (don't think that is how it is spelled) is very exciting and double-edged

Those two games won by Kasparov are historically interesting, even if beyond the grasp of some of us.  The Evans Gambit (with the thematic move 4.b4) was one of the most  powerful openings in the 19th century. In one of his annotations of the Bourdonnais-M'Donnell match, Morphy called it, "that most beautiful of openings," and, indeed, Morphy was an incomparable player of the Gambit from either side. However, even Morphy recognized, after his first game against Anderssen (see the Evergreen game for Anderssen's Evans' skill), that the gambit wasn't as all-powerful as it seems since black could give back the pawn and have a good game of it.  Later in 1895, Lasker demonstrated this conclusively and the Evans Gambit lost its popularity.  In 1995 (exactly a century from Lasker's "refutation"), Kasparov dusted off the Evans and ressurected it with two surprising and amazing wins againt two extremely strong players. Those are the two games above.

evans gambit

GM Alexei Fedorov  used to play the King's Gambit as his main choice vs e5 and he beat many strong grandmasters with it, eventually reaching a FIDE rating of 2684. He also played the dragon as his main defense to e4.

BTW chess.com's IM David Pruess (dpruess) plays the King's Gambit too, check out his blog to see the beautiful game vs GM Lalic.

So I would say the KG and EG can be played.

I think both the KG and EG are fine.  By the way, why do you worry if they can be played at master levels or not?  I don't think anyone here is going to be a master or consistently playing masters anytime soon.  Go with the opening that you like, and that you think is fun/interesting.