If you feel stuck, don't wait one more minute for the right answer, that's probably what got you here in the first place.
Stop worrying about what you don't know. Define what you do know, take the first step, and the rest will come later.
Only once you can properly dissect the real problem and begin moving forward, can you escape from it.
What does this all mean? It means that you're a lot further along than you think. So give yourself some credit. Realize that what you're doing is challenging. Put your head down, and keep churning.
Sooner than you think, limbo will be far behind you.