Well, you have no 2-point at all, and if you don't get the basics of the 2-point down you're horse is not going to have a good experience jumping and may not like to jump anymore. You really need to give with your hands, the horse is getting yanked in the mouth, and he does not look happy about it. You need to let your horse move freely over the jumps.
You need to put your stirrups up about 2 1/2 - 3 holes and practice your 2-point and giving with your hands over ground poles and getting a good feel for your horse.
Another thing is make sure your stirrup irons stay on the ball of your foot, the first picture they look too close to your heal. In the last picture your toe is turned way to far out. BUt again practicing your 2-point will help with this problem.
Your horse is jumping really big in the first picture, but its nothing to be concerned about. You should be encouraging your horse to jump not pulling him back.
Both of you have a lot of potential..good luck with him, he is a nice looking horse.