I became deaf at five so my speech is quite understandable. You’ll know you’re talking to a deaf man, but we’d be able to converse. I lip read well enough to get by in most situations but no, lip reading the TV isn’t an option.
I’m glad about your son taking ASL classes. Optimally, you would want these classes to count as foreign language credit. Many school districts allow this, and they should. ASL is an amazing language. I’ve been signing for forty years and am not quite fluent, although I do kick ass teaching math in ASL.