Jumpers are just more "pure" to me than hunters. You will need to bone up on your dressage now. No more counter bending and heavy on the forehand. Your horse will need to learn how to engage their haunch and bend correctly to be able to shave those seconds off of their time. Then, they will need to turn and drive forward to jumps from almost any distance.
You will have so much fun!
Jumpers are much closer to how horses are ridden in the hunt field than show hunters ever would hope to be.
No more perching on the horse's neck. No more jumping way ahead. No more fwd two point all over the course. Definitely bone up on dressage because the horse has got to get off its forehand and has to be able to get some serious weight on his hind end to power through a jumper course. And you have to be able to ride that canter on your seat bones and drive the horse from back to front.