I took some ASL classes in college, and Deaf culture as well. I am not Deaf so I am only telling you what I learned and not what I experienced. I think it's awesome that you're trying to learn more! It would be lovely to learn a little ASL, just hello and thank you and those phrases you'll use a lot. The Deaf community also says they appreciate it when you try to learn from Deaf tutors if you want to learn ASL, instead of people like me or interpreters or other hearing people

Turning on and off the lights to get their attention instead of scaring the crap out of them by touching them, lightly tapping the table (or banging if you become good friends) to get attention, or waving the hand. Technology has certainly made all of this a lot easier! She'll also likely have a "sign name" given to her by other Deaf people, I don't know if you should ask if it's appropriate for you to use it but I would think it would be nice if you would use her sign name instead of fingerspelling her name...that's all I can think of! Good luck!