I would suggest using lifeprint.com to learn some basic signs, especially fingerspelling (get GOOD at that), then just go to a Deaf event. Deaf people are friendly and will be glad to meet you, if you have basic vocab. Lifeprint has free dictionary and ASL1 and 2 Course videos. Suggestion: silent dinner. Be ready and able to explain who you are, why you are interested in asl, and some background info. Know basic signs that allow you to ask for repetition, clarification, slower signing, etc. Also, know most ASL 1 vocab if possible, but not required. get to the point of being able to "read " fingerspelling on online practice sites with a ""moderate" speed at least.
Please anyone who's Deaf correct me if I'm wrong about this.