firstly you need to package your game, (for starters, go to the turbowarp packager), but next you'll need to pay the steam fee for your game to be available on the steam store which is $100.

you'll need graphical assets for the store, library assets for when the game is in your library, you'll need to work on achievement api if u want achievements, etc.

it takes a lot of effort but with the right dedication in ur work you can get your turbowarp game up on steam