That sounds so good, P!
I love that you are modeling being a life long learner. I have also heard that some of the local university professors will have little "visits" with some of our kids, and try to answer their questions, so put on your "to do" list calling up the local universities, making friends with the staff, and seeing who you can come to visit.
As far as homeschooling goes. You can keep him in till the end of December, and then do a semester at home to try and see how he likes it. I've never done it, but I keep hearing that kids have more time to socalize when they homeschool, and that instead of just 'being around kids, but not getting to talk or play much' they get to actually play and work with kids who they have more in common with. Plus here in the US, afterschool sports and scouting activites are very big, and it's hard to fit them all in when so many hours are taken up with school.
Best Wishes,
Trinity