You've gotten the standard responses already: Join a social club. Play a sport. Go to meetups. These responses are not wrong, per se, but they're one step divor

You've gotten the standard responses already: Join a social club. Play a sport. Go to meetups. These responses are not wrong, per se, but they're one step divorced from the deceptively simple looking actual process of making new friends, which is this: Find people to talk to, and talk to them often. The ones who you like talking to and like talking to you will end up your friends. That's all there is to it, but like you already know it's harder than it looks, because the problem is finding like-minded people to talk to, and that's why you're getting a bunch of advice about hobbies. Turns out that people who like certain hobbies tend to enjoy talking about them with other people who enjoy those hobbies. It's a proxy for an easy conversation. Those who find it harder to have conversations with strangers will find it harder to make friends, so try to teach yourself that skill, because at some point it's all down to being a numbers game.