Try a smidge longer rein, so your horse and reach over the fence so that he can learn to use himself correctly. In this picture you're jumping ahead, which can be not only dangerous but can cause alot of inconsistancies throughout your ride. Scoot your butt towards the back of your saddle, and bend at your hip. I can't quite tell if you need to shorten your stirrups a hole, but you might want to so that you don't get the sensation that you're pushing your feet against the stirrups to get out of the saddle. Instead, butt back, hips bent, and when your horse jumps, allow him to close the angle between you and his neck, and close the angles of your legs and your hips being bent. :)
Also, don't grip with your knees or your heels, use your lower leg to secure youself.
It's great that you are holding mane, and not using his mouth for stabilization, and it looks to me anyway that you are looking up.
Other than that it looks like you're off to a great start!