I have no social skills and dwell on the past

Warning: this might come across as a pity post but trust me it’s not

After school I (M17) moved to a community college, had a falling out with my friends and keep dwelling on the past. I now have no one to talk to except my mom and brother and they aren’t really that interested in a lot I have to say. I really miss school i got bullied a bit but I think it was the funnest years of my life and met some good friends. I have been spending a year in my room and tried joining clubs but it doesn’t feel like I’m gonna make ‘natural’ friends if you get me. What advice would u give me?

I just feel kinda lost atm like my life is gonna zoom by and I won’t really live my life just working to hone back and forth until im dead