I just have to chime in on one thing. That first picture really scared me. Please, please, please, don't sit on him like that. You have zero control and no way to effectively get away from him if things were to go pear shaped. I have ridden enough young horses that spook when you disappear from one side and suddenly re-appear on the other side when you're on them. If he had spooked to the right, away from your head/face/arm suddenly appearing on his left side, that could have been a very real catastrophe, especially considering you likely have a foot in the stirrup on the other side.
Please, when you are riding a young horse, always be in a position where you can either stick your butt in the saddle, or cleanly get away.