How to meet new people

Hi,
I (21M) found myself in a position where I don’t really have any close friends and I’m rarely hanging out with anybody. After graduating from high school two years ago I lost contact with most of my friends, they weren’t even that close to me in the first place. Now I’m working and living on my own after moving out from my toxic family. I’m struggling with making any social interaction outside of work. I’m living in a pretty small city in Poland and there is not a lot to do here so it’s hard for me to find opportunities to meet new people.
Do you guys have any advice on how to meet new people ?