Hi Steve,
Welcome to Mobileread. Self-publishing through Amazon is certainly possible, but the big difficulty is in marketing and publicity. If you're serious about wanting lots of people to read (& buy) your book, you'll need to do a lot of this.
I'd certainly recommend getting someone else (professionally or not) to read through it to catch obviously error and typos - it's almost impossible for the author to do a good job of this.
Best of luck. Don't forget to mention it in the "
Shameless Promotion" thread when it's available.