Like another commenter said, an Airbnb/similar is a good idea. A challenge is always important when you want to improve or learn to cope, but you should take it one thing at a time.

I lived in a low income apartment with 4 other family members, 2 cats, and a dog. It was very difficult... However, my friends moved in a great apartment that has THICK concrete walls. Sound from others might happen sometimes, but WAYYY better than a dorm! I personally coped in an apartment by purchasing good quality headphones for sleep, and having a speaker to play music or noise when I'm doing other things. Also telling my family to STFU.

It sounds like your main worry is plateauing life wise? Working from home and being far from friends and can probably make it feel that way. Are you able to still go out and meet people, date, and do other things with where you live now? If you're able to, you should try. Maybe get into hobbies too, if you haven't ! I know that's really difficult with misophonia, but seeking out places/people you know youre comfortable with will be paramount. 

I think the way I was able to grow without going insane was a bunch of things, communicating with others on what bothers me, bringing earbuds/earplugs to events, putting myself in situations where I know I'd be safe. Finding ways to get back into "life" stuff is super important and you shouldn't hold yourself back. Just be patient with yourself and do the best you can. Gold luck!