One of the things you should remember is below the GM level, the opening phase is overrated.
On the internet... every other game is traps and or an attempted swindles... So I took on openings approach that is intrinsically hard for my opponent to pull me out the themes I study, that same approach made it simpler me to deal with different move order threats (transposing into and away from lines that are good for my opponent etc ) I picked a repertoire that also had clear themes, and clear directions when it came to the endgame.
A lot of people think my repertoire comprises beginner openings ... At first I was questioning this too... However... Two things have come to light... A) when my opponent's plays an equalizing line, the majority, don't know how play the resulting position as well as I do, this gives me a practical advantage B) the opponent will complicate the game! What starts out simple, usually get deep, simple middle game themes, tactics, and a clear direction of what to do in an endgame cut through the complexity..
It must be working, over the weekend I destroyed a 2055 elo player over on Lichess (down a pawn, in a bad position, he lost on time)
I don't play the KIA... But that's a good system that checks all the above boxes. Ignore the people who will trash talk it... stick to it, learn, master it
On youtube GM Noel Studer his video titled "The chess opening epidemic " (I recommend watching it and his other videos... he tells and explains things that many don't, in a way that is easy for the Chess hobbyist to understand.
https://www.youtube.com/watch?v=xDna9eIBM8M
I like openings that you can play regardless of your opponent's moves, but a whole lot of them are gambits with very specific moves that aren't much fun in my opinion. I just want a few openings that are somewhat simple and straightforward. I'd be ok with SOME theory(Not a lot) or just some tips for the KIA or KID openings. Please and thank you!