What the hell do people even talk about all day?

I grew up with social anxiety and never developed social skills. Never been with someone because I am boring even though guys have approached me based just on looks calling me cute. I have overcome social anxiety through exposure therapy unknowingly as I had to adult and do things on my own. Now I am not scared of anything I used to be growing up. Only issue is lack of social skills. I have nothing to talk about. Common interests can be topics only once in a while but what do people talk about all the time? Look everywhere around you and people are talking and laughing. I have no friends to practice social skills with. I am so boring i will end up alone. So please answer my question.