Social activities for toddler and baby?

I'm 20 and most people my age prefer to party, drink and do drugs. So I don't have friends at all since I'm a young mother of 2 under 2. My toddler has trouble engaging in social situations when she meets other kids, she prefers to be on her own. It isn't really a problem but since I have severe anxiety and I lack in the friends department, I'm just concerned that maybe my kids will be the same, and I don't want them to experience a lonely life. I have trouble with talking to people, I don't even have social media and I usually ask my mother or partner to speak on the phone for me - I'm trying desperately to overcome this. Does anyone have any suggestions of social activities for my children? I've looked into mothers groups but in my area they prefer babies under 1 and my toddler is about to turn 2. I'm not sure what else I could do.