In this day and age anyone can write and publish anything, even if it is utter crap. Self-publishing through Amazon (and other sources) make it easy to do. Quality doesn’t seem to be an issue – some people will read any piece of crap. And pay for it. Yes, people read books. Some have higher standards than others. But to your question – self publishing, particularly digital publishing, is simple. Try it. The worst that happens is that no one buys your book and you wasted a couple of thousand hours. The best that happens is that it is a success. Try it. The barrier to entry is very low.