Smashwords is good for getting yourself out there on all e-book formats in in the different e-stores. You can check them out (www.smashwords.com
) and if you click around enough you'll see it's fairly self-explanatory.
I would personally create your ebook using Scrivener. By the way, congratulations on the finished product.
I'm sure it does feel great to have it accomplished.
Unless you're going the traditional publishing route (which I assume you aren't, given the fact that you mention Amazon) then of course, Amazon is the way to go for self-publishers. If you want a print edition of your book as well, you may want to consider www.createspace.com
If you need a cover for your ebook or print cover try these guys: http://www.52novels.com/
If you want some ideas about how to use Amazon Prime check out this blog link: http://jakonrath.blogspot.com/2012/08/e ... aries.html
Come to think of it, you can learn quite a bit from Jo Konrath's blog as well as the special guest bloggers that write on it form time to time as well.
Good luck and cheers!