My advice is do it for yourself, however you want to, whatever you like.
I've written and self-published two books. The first one got a few positive replies and one person said it was a favorite. The second one got bupkis. I didn't write them first for others, but I'm glad at least a few people liked one of them. I wouldn't change a thing about the second one, even though I know it's too long, and goes into too much detail, I repeat things, and it has two endings. It's what I wanted to write and I'm happy with it.
Make yourself happy, and if other people like it, that's gravy.

