I Want to Be a Writer... But This is the Internet, Doesn't Everyone?

I've always enjoyed writing and I think I came up with a decent idea. I just need to start doing research. The issue is that I don't know what to do after the writing part of it. I realize that I'm getting the cart waaaaaaaay ahead of the horse, but these are the things I worry about. OK. I will update later. I want to get started.