As Maura covered the critique to the T... I'll comment on the martingale. Now others may disagree with this opinion, but I was always taught, when working a young or green horse. No gadgets. Work/train your horse so you don't need them. A good flat/dressage foundation will take you further. Jumping, even XC, is 90% flat work. You just have to remember to do your flat work. So no.... I think at this level, you should fix the high headness, and learn how to deal with it rather than use a martingale.
I've seen too many horses be martingaled up when they are still green and because the foundation was skipped, can't be jumped safely without one.
^^^ I agree.
After a little over a year, my horse goes on the bit and moves off my leg appropriately. But it took a lot of time, riding 6 days a week, and trainer schooling every thursday as well. My trainers still pushed me to use german training forks and draw reins. But I chose not to use such things... and the time I put in has since paid off. But boy, is it a lot of work!
No martingale, then. The only time he gets high-headed is when he's looky, not when he's strong. I softly half-halt to get his attention.