I don’t read poker books, don’t watch YouTube videos and don’t use a solver…I have learned from 50 years of playing experience…are there areas of my game that need improvement; absolutely…but I tend to learn through doing, not reading…
The area that should get the most attention is preflop…every hand starts preflop, and many hands end there, so by the numbers, it is the most important part of the game. Like playing bridge, you must learn the bidding process before you can play the hands. Proper bidding often dictates how the hand is played…same with poker…picking which hands to play comes before playing the hands.