I think it might be helpful to look at what sort of activities you enjoy, what brings you joy and inner peace - are these things you could join hobby/interest groups for? Like craft/reading/sports those sort of things. Also as mentioned by Skeezyks is there anything you are drawn to volunteer in? All of those things can get you among people, but no need to pressurise yourself, take it slowly, maybe you will meet like minded souls who you really hit it off with or maybe just being among people with chit-chat will be enough for you.

I agree 52 is not old, you could be at the beginning of a new interesting phase in your life.