It would be a great gift to your son to see, accept and respect him as he is, even as you wisely give him opportunities to stay active and expand his capacities. But I hope the opportunities are just offers, and he has a choice in the matter. This is something we all long for, and I'll bet you can find this wish in yourself if you pause to look.
A one-size-fits-all approach works only for those of us who happen to fall close to some social "norm." My mom pushed me to be more social and participate more in the activities my peers were doing. It was always very painful for me, and did NOT change me into a more outgoing person.
If anything, it made me feel more shy and reluctant. My mom interpreted this as stubbornness, and became increasingly forceful (and punishing) over the years. I finally "ran away" into a very difficult marriage to get away from her, though I couldn't have said at the time that that was what I was doing.
As I finally learned to see myself and accept my own nature, I became both more of a recluse/dreamer AND, oddly, more social, because I began to discover other people who were more like me. A chosen family of sorts. And I became a successful artist. This could never have happened if I had stayed on the course my mother set for me.
My relationship with my mother is still an enormous challenge for me today, and I'm 60 and have been working forgive her for much of my adult life. It's hard, because I still don't think she has a clue about who I really am. Or who other people are, for that matter, if they are different from how she is. She never seems to get past her ideas about how everybody else's world "should" be. But I have come to see that I'm responsible for giving her what I wish she could give me (that old Golden Rule): acceptance and respect for who she is.
If you think about it, you may not want to risk losing a good relationship with your son by forcing him in this way.