I have no friends, no job and when I did I worked with boomers that had grandchildren so we had nothing in common. How to make friends or social connection? I have no idea, maybe join some clubs, like book clubs where it's mostly women or join some amateur sports leagues.
Softball is really popular in America for normie men, maybe Europe has something similar? There's also church, it's easy to make connection there if you are NT. You don't have to believe in God, just attend for the social benefits.
I've done all these things, but I'm non-NT and physically deformed, so it didn't help me. If you are closer to normal, you might succeed.