On Chess

I reached 2000 ELO on rapid chess and 1800 ELO after approximately a year of consecutive playing, without undergoing tutoring or any form of training, having never played the game before, here are some thoughts.
I plan to not try to improve anymore, because the effort involved in raising your ELO 100 points increase exponentially, a 2000 ELO can roughly beat 99.6% of chess player you see irl, which was my original goal for developing this skill.
My opening repertoire is mediocre at best, which I compensate with a positional intuition that allows me to outplay in the endgame more often than not. One of the worst thing to do is to play non-stop without ever reviewing the games or building up some opening theory. If you stumble into an opening trap, even if you are magnus carlsen, if there’s no defence, there’s no defence. Usually after getting trouble in the opening, I goto the chessable course segment with regard to that specific variation. In this regard I recommend Wesley So’s (Best by Test) e4 from white and firstly accelerated dragon until 1500 ELO, and diversify into Anish Giri’s Najdorf in response to e4 (I am aware that these are some shady sources for uploading chess courses). I do not think it is necessary to develop a reportoire against d4 or c4 to be sufficiently good as I don’t have one. But if it is within your ability, then of course it is beneficial.
In addition, Naroditsky’s Speedrun series are fantastic for developing tactical and positional visions.
I am not a fan of gambits in slower time control as they are too gimmicky, though I do recommend studying following lines based on 1. e4 and 1. c5 on white and black respectively: Smith-morra and Tartakower variation of the Sicilian as they one of the few gambits one could face and I found them to be very dangerous.
Use the analysis tool (a lot) and play with yourself in some theoretical positions, (I forgot how many times I looked up the fried liver position as you encounter these trolls from white occasionally).