No stupid questions, only people to be enlightened!
If you want a place to talk out of character and signup sheets, you should go to Plot and Signups area to post your idea and everything to get people to join.
You do this by using a button just above the threads called "Post new thread".
Adventure stories! They can be fantasy, modern, sci-fi, all kinds! Give me some good world travel stories and I'm all over it! I also enjoy romance stories and even though I tend to play females I love playing gay men.
In addition to what Kitti has so kindly directed you to, if you would like to start a game where people don't have to create characters you can just go ahead and post your opener in the Jump In section!