SO, YOU WANT TO SELF-PUBLISH?
Many, many months/ years have gone by. Many, many revisions have been made.
Your manuscript is complete.
Have other people, whose opinions you trust, read it and give you specific and honest feedback.
Talk with them about sections that make sense and sections that don’t.
Ask them which parts hold their attention and which parts don’t.
Discuss the characters and whether or not each is disinct and fully fleshed out.