Thanks! That's a good tip. I taught myself fingerspelling the night after I met him, and now we hang out like... honestly almost every day.
The first day we met, we used our phones to talk because I didn't even know how to fingerspell and knew only about 10 words (holdover from when I taught children with communication impairments at a grade school) The second time we spent time together, we used our phones only a little, and by the third time we weren't using them at all. We've been hanging out about three weeks. On the days I don't see him, I self-study Bill Vicars videos, or read books on ASL grammar, etc.