Your whole body is kinda scrunching together your leaning forward and looking down, your hands are too low and you need to push your heels down a bit more.
Think push those heels down, lift those hands, sit up straight and look up, you look like you have a nice long body for riding so show it off!
In terms of the horse, I think he needs a bit more activity, he is round through the neck but it looks more like he is leaning into your hands and on the forehand, rather than pushing with his hindquarters and carrying himself. Make sure your pushing him forward into your hands. Your better off pushing him into firm but giving hands (not holding, but contact), asking with a bit of inside flexion through your wrist and bending with his inside rein. Its good to be light and playing with your hands, but watch you don't go too far in this direction and end up 'snatching', that is giving and taking jerkingly, it might get him to drop his head but it will never get him firm and steadily on the bit. I only say this because its a very nasty habit I've gotten into that I *just*can't*break*!
I hope that actually makes sense, I don't think I explained it very well:)
And sorry if it sounds mean, I feel like I've been really critical! He looks like a lovely horse and if you just straighten up you'll have a really nice position