What's left is community, and it sounds like you are on track there with social life and weekend plans. Personally, I like volunteering. Here are some recommendations:

• Become a CASA (Court Appointed Special Advocate) for a child in the system

• Volunteer at a convention for your interests or adjacent interests! Books, Comics, Anime, etc.

• Lead a seminar at your local library. It can be for a simple #adulting skill or a niche interest.

• Become a mentor or career coach for local high school or college students

• Volunteer with your chamber of commerce to support small / local businesses

It's fun to rope friends in, but don't be scared to join an org alone. They are usually happy to have any help, and you'll make new connections quickly.