really, he just wants me to read him books, books, and more books!
yay! so while it's possible he might not have a ton of interest in the more formal stuff right now, he's clearly super-keen on
learning - which, speaking as the parent of a kid whose thirst for learning was killed by Pre-K last year (ugh), is the main thing!
going with the flow doesn't sound like such a bad plan - you'll really never know how he responds to school until he's there. so much depends on the environment and his personality. stuff to watch out for might include: a wide gulf between what you see at home and what the teachers see, an uptick in behavioural issues and, sadly, teachers who may think you've been pushing him - even though you haven't been.
best of luck, and welcome! this board is great.
