Being reactive vs. proactive.

I think this is the thing I personally struggle with the most. My military traing always put me somewhere the line was what you could see in that moment; a split second decision. I still find my brain regressing to that and sometimes it works and sometimes it doesn't. I do a lot better with fianchetto openings, should I just stick to that or put in the effort to half-learn other stuff. (If I win 55% of English/Sicilian games, should I bother spending time doing the London or Catalan, QCD lines, etc. in the short term? English & Sicilian for example I'm pretty confident in and can play most variants of those in my rating and not lose (tbh the ones I outright lose get banned lol.)

My queation is at what point do you push yourself to make the decision to adjust? I push for an advantage early and if I lose that I get super reactive and end up pushing myself into positions that do not feel natural or comfortable and finding a way to uhh balance the scales seems unlikely unless my intial severed the lifelines most defences rely on. Iove taking C&F pawns out of an equation if they're advanced for example and I'll hyper concentrate on the idea of pinning something down and weaking the castle. Probably bites me in the ass a lot but I think the best comparison is my brain works like the London versus the Jobova London.

First,

Play what you like, and then adjust your opening play to what you are encountering.

I familiar position is a huge practical advantage even if Black is equal. The great thing about internet chess is you get exposed to a massive amounts of styles and responses to what you are playing... it's times 10 way more than if you just were hanging around a chess club on a Tuesday night.

The fallacy is there is no perfect opening repertoire. There will always be a defense, a line or multiple lines that because what you know, because of what you like to play.. give you fits.

That's chess life. You will never get the familiarity in your opening play to advance if you keep jumping around from one opening to another... you have to build on that to play the middle game,.... then once you learn start understanding endgames and gaining technical skill... you will by then have the knowledge to change aspects of your repertoire