Hello and welcome to the forum! There are some useful links here.
My additional advice is to play lots of ChoiceScript games, whether published or in progress (if you don’t want to buy a completed game, there are a bunch that are available for free) and figure out what you like and don’t like in this sort of game, and what feels successful and what doesn’t. It will really help solidify your goals and ideas and give a sense of what the possibilities are.