Welcome! It’s quite a challenging question, since every family, every child, every situation is different, but I would humbly suggest you just start with a few things to round out this year and then use your summer to prepare yourself and your son for the fall. We actually school year-round, but if you are both used to this break, by all means, take it.
A few easy things you could start with are just little things really that add up to the whole philosophy… for instance you could implement shorter lesson times, add in art and nature study every other week, add in a very low-key narration maybe once a week, and add in some living books from the booklist. In fact, maybe choose a few in his favorite subject from last year or from this year, just as fun reads, not required.
Once the fall comes, he’ll be more aware of the approach and will hopefully have caught the ‘good lit’ bug from those few books. I’d even offer them through the summer if he seems responsive.
There is no right way to do it. Do what works for your son. Ask him how he’d like to do school and see if he comes up with anything usable. I’m surprised at the great ideas my dds 8 and 5 come up with.
Again, welcome and HTH-
Jenni