There are lots of sites that can help you self-publish. I think 48 Hour Books is one that has decent rates, though you may want to shop around. Prepare yourself to do your own marketing, though. With Amazon and other internet sellers, there's a market for all kinds of books, but the trick is getting the book in front of enough people to generate interest and therefore sales. I am part of a few book clubs that send Kindle copies to people to read in exchange for a review on Amazon (helps build visibility) so you might look at that.
Tiana Warner has a guide to self-publishing and she's been really successful with her self-published YA trilogy.
Thank you both for your responses