Like others said, it seems like you want to do dressage. But that doesnt mean you can't jump!
Me and my horse are going into juniors this year, and yesturday we were galloping around the arena bridless and bareback, playing tag with my friends. Lol.
Just do dressage mainly, and when you feel like it, jump or do some xc, that's what I do, and in my opinion, it is better for the horse to do a few different things, just focusing on dressage all the time isnt to good for the horses mind, it can be very stressful for them (not to mention the rider ;) lol.
So do both! :)
If there are no horses in heaven... im not going.