What "side quests" could I do to get rid of my social anxiety?

Since moving to Vienna it’s gotten a lot better overall. I’m way more used to being around people now.

But I still get pretty anxious sometimes in social situations, especially around people I don’t know. Not extreme, just that constant overthinking and tension. Right now I try to go out every day and buy something small just so I at least interact with a few people. Or I go sit in parks or public places to be around others. But since it’s pretty cold here, that’s not always that fun.

So I’m kind of treating this like a game and giving myself small “side quests” to level up socially I guess :)

Any ideas?