Cut back and make a sharp, concise story. And put the book aside until the moment when you have something else to say. To pour water just for the sake of volume is not worth it, otherwise the idea will drown, and no one wants to finish reading. Burn with a verb and do not look back at the initial ideas - art has long spat on them
A common thing. We need to think out the characters of the characters, situations, descriptions. Try to divide the book into parts.
Take your time. Write an introduction and conclusion.