Fans are nice to make white noise when sleeping, as are softer sounds like a sleep music playlist. For earbuds and headphones, look for stuff with individually customizable audio per side if your tinnitus/hearing damage is asymmetric like mine. I also found a lot of use for headphones that allow audio passthrough and turning up that ambient sound because I lost hearing for certain pitches (which coincidentally are really close to same pitch as the ringing in my ear now) and sometimes struggle to hear what people are saying in surrounding noise. Earbuds that focus on voices help with that as well.

As far as getting used to it, my hearing was damaged at 24 and I'm 35 now. I got more used to it with time, better at selectively listening what I need to, and finding ways to block the ringing out or ignore it mostly wasn't a terrible experience. Mostly that means I just am always listening to something. Music, TV, a stream, whatever. For me it's medium-ish loud so it's always a bit annoying, especially when it gets in the way of actually hearing something or it keeps you up at night or something like that, but please believe me when I say it isn't so bad. I still enjoy music just fine and get to sleep on time. I just don't need all my hi-def audio equipment anymore, hahaha.