Re terminology, there’s a wide diversity of approaches and terms. I always recommend Standard Patterns in Choice-Based Games by Sam Kabo Ashwell, and Emily Short’s blog which is generally about IF but whose principles apply widely, and she also has some excellent articles about ChoiceScript and long-form IF structure.
I also found End Game and Victory Design on the CoG blog very useful. This explores the sort of structure seen in work by Kevin Gold and others (including erm, me) that results in wide-ranging endings for these kinds of games. In fact all the blogposts under the Game Design tag are helpful, as are the CoG Game Design Guidelines. Whether or not you want to follow them, it’s really helpful to know a bit more about what goes on under the hood, and to make design choices consciously.