Well, going out and talking to deaf people is one option.. but if you can't find the deaf community in your area, the second best is to use videos and books. I'd check amazon.com for more ASL dvds.
There are many dvds you can use. and there are many online resources.
And remember what a lot of beginner ASL learners have said.. IT seems like most deaf people shun those who are learning or make fun of them.. So the best way is to learn via internet/dvds, or find a ASL class you can go to that will help you learn better.
But remember.. not all deaf people will shun beginners.. I've worked with people who've been learning sign language and I'm patient with those who don't know ASL well.
