Its actually a mixture of both. I like looking into existing settings and editting them to my liking. Other times I try to come up with my own. Either way, I love making stories, especially when other peope can appreciate them. And role playing is one way to do that
Then I think you'll find what you're looking for here. There are several volunteer members designed to help out with new members, but go look at the Interest Checks when you're ready to RP. They're separated by level -- there's something for everybody.