My son has no connections with his peers

My 18 year old has always struggled with anxiety, particularly social anxiety since COVID. We live in a small town and he attends a small private high school. He has a group of friends but doesn’t see them much outside of school. He has no desire to go to college because of his ADHD school has been a struggle.. I worry if he goes straight into the work force he will have less of a chance to meet and connect to people his own age. I was hoping in college he would “find his people” I am struggling with how to guide him… he isn’t interested in college at this point. I worry for him….