interacting with people in some way, specially family (if you have any left), is likely to improve your mood
you don't mention where you live, but given that you know English, if it's not something undesirable, consider teaching it, while having some sort of qualification/certification might be useful, what's important is that you know it to teach it, at least in a "getting people to talk" way
another job option that seems viable (at least to my mind) is becoming a teacher of what you studied
for the "wife and kids" thing, I don't think I could give advice, I myself have been single for over a decade