Two quick misconceptions to call out for those less familiar with signed languages: 1. ASL is not just English with each word replaced with a sign. It's an incredibly complex language with different grammatical rules, some of which don't have English equivalents. 2. It's incredibly flexible. Many core grammar components will remain consistent, but often if you drive to another city, many words/signs will be different…
This is kind of unrelated, but I wonder if a small amount (say 100 signs or so) of sign language (ASL or local equivalent) wouldn't be useful for hearing people in their day-to-day lives. I'm very interested in sign-language, but language being what it is you can't do it alone ...
You doubtless already use many signs. They may not be ASL but we do use a variety of hand gestures to convey very specific meanings.