You’re looking for that inner enemy that’ll help you to structure the book. I always have inklings of it, but tend to find it by writing interior frets and confessions and yearnings as I recall them. Maybe it’s only manifest after a first draft. Once I’ve found it, I’ll revise with it as the spine—how the self evolves to reconcile its inner conflicts over time. Your attendant setbacks and jackpots should lead up to a transformed self at the end.