My daughter is 14. A 'typical' week looks like this:
Monday
IGCSE Latin Lesson (I help her with this and a pupil at a local state school has permission to join us as the school doesn't offer the subject)
Singing Lesson (external teacher)
Tuesday
IGCSE Biology (Net School - online school)
Level 4 Art Course (OCAD)
Musical Theatre (local adult company)
Wednesday
IGCSE History (Net School)
Musical Theatre (local junior company)
Thursday
IGCSE English Lit (Net School)
Level 4 Art Course (OCAD)
Pottery class (local adult class)
Friday
All day at a local Montessori Elementary Centre (my daughter is officially over age but she still finds the practical maths work very helpful and has a kind of pupil/teacher role a lot of of the day).
Between these 'fixed' events, she does homework for all the 'qualification subjects', practises her singing, practises tap dancing (we bought an online course), bakes and cooks, reads a huge amount, plays the ukele incessantly, felts pictures semi-professionally (people commission her work) and does lots of graphic art.
She already has IGCSE English Language and will complete all her other IGCSE courses over the next 15 months. After that, we are going to take a year to focus on IGCSE maths. If all goes according to plan, she will get her IGCSE Maths when she is 16 and then she can decide what the next step is going to be... At the moment she favours courses with the OU over A levels but all of that might change.
My main advice would be to follow the interests of your son as much as you can and remember that home education is an extraordinarily efficient way to learn. Sometimes I think I'm doing nothing with my daughter, but reading this post makes me realise she is actually learning a lot!