The best way to handle this is to lean into any activities or hobbies that you enjoy, and then find a place were you can partake around other people..classes, groups, etc.

Once there, just be approachable and friendly. Everything else will fall into place.

I found success this way because when you think about it you're not starting from zero. You're going to already have something in common with those other folks there and that can be the foundation for conversations/hangouts.

I was in the same situation about 6yrs ago after breakup with no friends. I have made dozens of acquaintances and three of which I can say are the best friends ive ever had.