I also isolate because of my social anxiety. Sometimes isolating can make anxiety worse. We are social animals.

I don't have a car either so it's the city bus for me. Taking the bus itself is hard. Always worry I will get lost or something else would go wrong. I'm also embarassed that I don't have a car.

You can type "meet up and the name of your city" in google and there may be a social anixety group in your area to go to, it may take a lot of courage to get on the bus (try distracting yourself like with a book or something).

Remember baby steps and exposure therapy.

Hugs to you.