I'm going to run my first game in two days, and I'm going to spend the entire day with the two players I'll run it with.
I plan to have a brainstormy worldbuilding session first, to figure out what each players wants to see in the game, what they expect, what kind of character (and world) they want on their hands and such.
After that's done, how long should I take before the first session with them playing as PCs, GMed by me? How long should it be between "Session 0" and "Session 1"? Can it be done in the first day?
P.S.:We are running Fate Accelerated, and right now I don't know for certain what kind of world we'll have. I have many ideas, but I don't want to prepare much before-hand, in case they want something radically different.