Here’s the problem with self-publishing: no one cares about your book. That’s it in a nutshell. There are somewhere between 600,000 and 1,000,000 books published every year in the US alone, depending on which stats you believe. Many of those – perhaps as many as half or even more – are self-published. On average, they sell less than 250 copies each. Your book won’t stand out. Hilary Clinton’s will. Yours won’t.
So self-publishing is an exercise in futility and obscurity. Of course, there are the stories of the writers who self-publish and magic happens and they sell millions of books, but those are the rare exceptions. How rare? Well, on the order of 1 or 2 per million.
If you like those odds, go for it. If you don’t, and you still have a book in you, then please, please read Guy Kawasaki’s book APE: How to Publish a Book, co-written with Shawn Welch. It will save you from yourself and that obscurity.