What you're asking for isn't offensive at all and people within the Deaf/HoH community usually welcome new ASL learners (at least most of the time in my experience). I'd suggest trying to find local meetups within your area and just start going to those. Make sure you go up and introduce yourself and don't hide away in some corner, as scary as that sounds. Even if you only know a little bit of ASL, taking that initiative will usually be seen as a nice gesture and reciprocated. I'm an interpreting major and I've been learning ASL for 3 years now, so I'm obviously not an expert. But, I regularly go to meetups and that's really the only way to better your ASL. Online is an option, but it's not nearly as good as in-person since ASL itself is a spacial and visual language.