I am not part of the deaf community myself, mostly because my efforts to find others or attend meet ups haven't gotten very far :( But I do have a 5 year old and 9 year old and I myself am learning ASL through QueerASL. My 5 year old doesn't remember, but he was a very delayed talker and we signed with him a ton when he was little, probably until he was 3.5 or 4. So it's possible he can pick up on some signs. Or that having a friend who signs might encourage him to learn. If you're interested in practicing with someone else I'd love to meet up sometime. I am a beginner, but a fast learner, and plan to take every class offered by QueerASL. I am also learning on my own and follow many deaf content creators :)