My son feels empty

Hi There. My son is 21, nearly 22. He currently lives with his Dad, but hes staying with me  at the moment. Hes told me today he feels empty, like his stomach just swirls with knots, he couldnt really elaborate anymore but, Im thinking he maybe depressed or anxious.

He works full time, and was learning to drive, but covid put a stop to that and hes now stuggling to find an instructor thats willing to take him, hes already  spent 3k on lessons, so hes feeling pretty rubbish about not being able to carry on. I know hes lonely, he does spend alot of his free time on his own, hes got a great relationship with my parents who live near by and see him often, as does his Aunty and Great Grandparents, but hes said its not enough, he wants his own friends, who he could socialise with, he has no problems when meeting new people and starting a conversation he just struggles with maintaing it. He has aspirations to do more than what hes doing he just doesnt know where to start. So thats why I'm here, any advice or info would be greatly appreciated.... Many Thanks T