Your son is only young Lynn. I didn't begin to get interested until I was in my forties. I only began proper research in my fifties when I got hooked.
I have made ring binders for my daughter and all my nephews and nieces, and presented them with them whether they were interested or not.
Now two nieces show a great deal of interest, and I have made proper books for them with photo's and certificates.
My nephews showed no interest (even though one on his Mother's side had Spanish and American ancestors ..I'd die for something like that). The other nephew's small son, was given school work on family history. He took the ring binder in to show his teacher, who made a great fuss over it, delighting my great nephew so much that he began to take an interest.
So it might not be this generation of your family, but the next that carry on your work. So make sure your son knows that it is his responsibility to keep your research whether he personally wants it or not, to pass on to the next generation.
Maybe you can get him interested not only by making the web site, but by asking him to try to find an ancestor for you on a census. Tell him you just can't find them (even if you have already). When he finds them, tell him what a great researcher he is. Then ask him to try and trace another.. after that he should be hooked

Su