You want to become an author, but sometimes it takes a long time. Most publishers won’t read unsolicited work that hasn’t been seen by an agent first. Submitting a manuscript takes months. Getting published might take years. Flash fiction is much easier and quicker to sell than a novel and a short story, and it’s a first baby step into the world of publishing. Fame and fortune. Probably not. But it’s a step in the right direction.
I have always thought of it as crossing a stream. Your goal is to get across and become an author, but first you have to stick your big toe into the water. The water might be a little cold, but if you keep taking enough steps you’ll eventually get across.
Here’s an article from the Huffington Post, Starting Your Writing Career: Become A Published Author In Six Steps: