Struggling to find new social circles as an adult after pandemic

Hi, I would appreciate some advice on how I could improve my social life as a working adult. I'm 29 years old now. The shortest and simplest way to describe my problem is that I have had expectations about how life would be as an adult which somehow are not fulfilled now, but I don't know how to improve it. It feels like my social life peaked when I was in university where I graduated from 6 years ago.

This year has been mostly depressing in my opinion, because I have felt loneliness quite often. The pandemic was still a thing in the beginning of this year where I live, then it sort of disappeared because all restrictions lifted. It was great but my social life did not get much richer. I did try some new hobbies and explored new places but the city I live in is not that big. Also I have lost contact with most of my old friends because they have moved and I guess people my age start to form families to some degree. The only positive thing has been joining a dance course where I have had fun and met new people. However most of the time I feel depressed which again blocks me from trying to do more.

I'm single and don't find dating easy because of my introverted personality. I sometimes envy people who met their partner while in university or on Tinder because I have not had great results from there. This might sound a bit contradicting because at the same time I feel that what helps me is when I'm surrounded by people, like when I was in university. It makes me realize I'm not alone and increases the chance of social interactions. Now as a working adult it feels like I have to join so many new groups and hobbies to be able to get results that I burn myself out. Still if I don't do it then I experience loneliness to an uncomfortable degree. I was wondering if I am the only one or has anyone else been in a similar situation also? If so, how did you improve it?