Hopefully your husband can find new real friends there. I know it's not that easy to find real friends but I really hope he can find some.
Introvert people like me can go inside supermarket and go out without saying anything except thank you when a cashier will give my change.
In your case you can talk to them so easily. But I am practicing it too, I'm trying to connect.
I'm an introvert too, believe it or not. I guess just a different type. Strangers are easy to talk to. You know what helps? Compliment someone on what they are wearing, or their hair, even if it's not your thing. It works a treat. There's always something to like about people if you look. Humour helps. Even 'hows your day going'. 💚💚
Oh that's a good way to start conversation. I should try it if I would met someone I didn't knew.