At no time in our recent history have book authors been in a better position to compete heads up with the Big Boys. So if your going to write books and sell them on the Internet, you'll have a very large and responsive market. The only difference will be that your books will be in a digital format. But, before you do anything else you should determine whether or not you want to make a living as a book author. This is extremely important for a couple of reasons.
Some authors just like to write, while others want to write books for a living.
Deciding which one you are is very important because it may determine what kinds of books you begin to write. It can be artful, emotional, imaginative, thought provoking, and entertaining. However, fiction is purchased mainly for its entertainment value and has to compete for entertainment dollars. You will be competing with movies, fishing, golfing, hiking and anything else that entertains the population and of course other works of similar fiction. In general, nonfiction falls into the category of informational types of books where artful, emotional, imaginative, thought provoking language and how to use it is not necessary.