(If you've ever got a question about where to post things - or anything else - drop me a line. That's what I'm here for!)
As for your idea, I think a lot of that stuff is up to you. Don't worry so much about what other people want to read; write the story that you would most enjoy reading (and writing).
Very well; I hear; I admit, but I have a voice too, and for good or evil mine is the speech that cannot be silenced. — Joseph Conrad, Heart of Darkness