Welcome. No you are not the only one. Read some of the threads and you can probably pick out the ones who I think are even younger than you, or act like it. Enjoy, you'll probably have a laugh or two during your browsings.:D
Hi,
No, the youngest I remember, so far, is 13.
Welcome to the site, and ask anything you wish. You can also even answer questions if you wish.
Best wishes,
fredg