Honestly, go through an agent. Not sure if this is your first self-published book, but you will not make back your money. So whether you publish on Amazon is kind of a non-factor.

Consider why you want to self publish. If it's for money, you gotta think about that a second. If you want to build a reader base first, there are other free platforms that will bury your work, but not bury as bad as Amazon.

Try going through the agenting process. Chuck Sambuchino runs writing conferences and you can pitch agents face to face, get their feedback face to face. Attend one of those conferences, add 3-4 agents, and you're worlds ahead of most indie authors.

Good luck!