I'm 20 and feel like I'm in a similar spot. Lacking the ability to establish a connection with anyone outside of close family members, and even then that only really happens when they are the ones driving the conversation. I feel like I don't know how to talk to people, that even if I stopped stuttering today, my life wouldn't be all that much different because I have no idea where to start building those skills. I think it's sort of like a spontaneity thing. Everything we say is so planned out beforehand to avoid the stutter, that we can't come up with talking points. Almost like a "only speak when spoken to" sort of mindset. Or at least, that's how it feels for me. I wish you the best of luck in your endeavors my friend.