http://www.lifeprint.com/ this is a very helpful website, I used it to teach myself some stuff. Learn the alphabet first, then continue onto that site, if your interested in learning ASL.
Heyy I am in ASL one currently, and have really wanted to have some more practice outside of class that I could have at home, as I cant go to every deaf event. If you would like to do that please let me know! :)