Maybe get interested in a new hobby? I know it’s not what you wanted to hear, but personally I’ve found learning new stuff with others who want to teach me to be pretty fun. Granted I’m someone that doesn’t stay in one place too long, but I always enjoy the friends I make along the way
Facebook ironically, you’re also gonna need to be kinda extroverted, talk to random people and if they look like they know stuff ask them if they know any x clubs or any clubs to do y by any chance. Most people probably won’t but some may give you some leads. Check local posters at local restaurants or coffee shops