itch.io

there's a bunch of tutorials for twine, a lot of documentation too. idk what's the best way to start, but id say checking r/twinegames is a pretty good, theres a lot of useful links there (mainly the discord was very useful to me)

Learn html, read the code for the games you like to understand what choices they made, and then write code inspired by what’s common between those games, with your own spin on it.