How to close a game where you’re up a rook or a queen (without stalemating).
How to close a game where you’re up one pawn, if it’s not a forced stalemate.
Two bishops is maybe something you want to learn. Theoretically knight + bishop as well. I play a lot of bullet chess and pretty much never see these though.
The rest you can really only learn with practice and pattern recognition, like how to move your pawns and how to use a minor piece to secure a win. Well, you can try to learn it algorithmically but I wouldn’t recommend it. After learning those I would move onto tactics, because those are generally how you gain a material or positional advantage that doesn’t rely on a very trivial mistake like leaving a piece uncovered.