Another idea I give people is a book club. This is not something I personally can do because I cannot focus enough on the plot, but if you can, it would put you in touch with people in RL. And maybe there will be single/divorced men among them - who known? At any rate, it will be socialization.

I have recently taken a hobby class and it helped alleviate anxiety. It does not help with the r/s with the opposite sex because in this hobby - beading - everyone is a woman. Still, you get to do something useful alongside others and chat with other living breathing human beings. Maybe meet ups, hiking trips (good for your cardio exercise, too), something along these lines - just to meet other people, not necessarily with romantic intentions.