I don’t actually see much wrong with your photo to be honest. You are getting a bit too far forward. Crotch should be behind pommel of the saddle rather than above it.
Your horse looks to be a bit of a flatter jumper, (Mine is too until the fences get large), really for you/your horse it is more or less a canter stride over those size fences.
Ideally, the horse should lift his/her shoulders over the fence and come up to you which closes your hip angle for you as long as you are in a proper position and staying with the motion. But if your horse if flat, there isn’t much help in this department. You have to do most of the work.
I would suggest moving your stirrups up a hole and work on your two point through the canter, sink your weight down the back of your calf to your ankle and think Flinstone brakes. (This helps me sink my weight down in the stirrup, keep my leg steady and prevent any gripping with my knees).
That size of jump doesn’t need a big release, you in your two point with soft elbows and getting the right striding should be enough.
Good luck, you look great!