Wow, this is really interesting. i have never being to gym before not to talk of learning a martial art. But i will like to learn BJJ for physical fitness. I don't think there is a place to do that here.

I’m a skinny girl, and if I punched someone, I’d probably risk breaking my own wrist before I could inflict some damage to someone else.

hahaha, that's funny. I wish i can become slim a little bit. But don't worry, you are strong even if you are skinny. Lolx.