Yeah, I'm definitely going to do some real reseach before I get to far into my writing. This is one of my two main characters, so there's going to be quite a bit of it.
Thanks for the help, it is much appreciated.
EDIT: My narrator is hearing, and his girlfriend is deaf, so I'm thinking I'll write it out as standard English in quotes, and I'll describe some of the signs and body language that goes with what she's signing.
I don't actually know sign language myself, I just thought it would be interesting to include a deaf character. So I'm thinking it would be really helpful to actually try and learn some sign language myself. I figured I could just get away with saying she was signing whenever I had a dialogue scene, but I see now there is a lot more to it than that.