The right starting hands depend on your seat. Early position is tight. The button is wide. A laminated “always play these 20 hands” card is how beginners bleed chips.
Under the gun you open a tight, strong range — lots of players still to act. On the button you act last postflop, so you steal wide. Same two cards, opposite decision.
Think in bands, then look at the real grid:
PokerGym publishes the house opening ranges as 13×13 grids — same charts the trainer grades you against.
Drill it. Opening the right hands is step one. 3-betting, defending the big blind, and not calling too wide are the next leaks. Train grades those decisions on a felt, not a quiz.