Your horse is very handsome! How tall is he?
For starters, reposition your stirrup iron so that the outside branch leads the inside and the iron lays at an angle across your foot rather than straight across. This will allow greater flexibility in the ankle area, alowing you to sink more of your weight into your heels keeping your legs at the girth.
Right now, your incorrectly placed iron has caused a stiff ankle. You obviously have good weight in your heel, put instead of the ankle flexing and the heel lowering to its full capability, your leg has instead pushed forward a tad.
I love your upper body and the fact that you are looking ahead to your next fence. I don't think you are too far forward at all. Very nice!
Perhaps your most glaring fault (and its not even that bad) is your hand position. Your hands are planted at your horses withers at the point in your horses canter when they should be giving forward a bit. As a result your horse has braced against your hand and is moving in an inverted frame. In this frame your horse cannot reach undre himself with his back legs and carry himself off the fore. Moving in this manner will greatly affect his performance over jumps.
I'm guessing that your horse is hot and strong on course. In the pic, he has already locked onto the next jump, which is great. But pulling on the reins to slow him will only make him more tense and resistant. Guive a little with that inside rein and ask him to soften by wiggling your ring finger.
You are doing an excellent job of sitting deep with your seat to slow him down. I suggest really using your corners to slow him, use your turns to get him up off his fore, use a strong inside leg and ask him to pick up that inside shoulder. In the pic, he is going thru the turn flat, make him bend around your inside leg.
Once you get him more responsive to you in between fences, your rounds will improve greatly!
Your horse looks like a quick jumper and I'm sure you both do really well! Good luck!!