ASL is heavily inspired by English, so it's usually very easy for people to become basically conversant in it rather quickly. For signs you don't know, there

ASL is heavily inspired by English, so it's usually very easy for people to become basically conversant in it rather quickly. For signs you don't know, there's literal "finger spelling" that's part of the language, so conversational learning is greatly aided by this. Which.. aside from that, you could do this anyways. When I first started living with a deaf person, I just wrote things down on paper, and they wrote back. The glasses have some benefits over paper, but significant drawbacks as well, and many deaf people I've met have been trained to read lips. This isn't adding much.