Look at the books you most enjoy reading. How does the story develop. One of the mistakes most beginning writers make is to think that they have to get the story right the first time. We are not carving in granite here. Everything that is written can be and should be and usually must be rewritten.
Nobody gets it right the first time.
Choose your favorite piece of the things you are writing and try to impose some kind of order on it. Keep working on it. Don't lose patience and start writing something else or you will never finish anything. Just keep working on that one piece until you get it into book form. Don't try to write it into book form at first.