so i cant help much as far as the jumping goes as i am not that good myself
^^but i can see a few things that can improve in the flatwork.
first try to sit back in your saddle and dont lean forward. look over his ears and not half way around the circle . Try to keep you hands upright with thumps on top so that they dont falll inwards and be flat.
try also to roll your shoulders back and have a deeper seat.
otherwise you leg position is good and overall you are a neat little rider. keep up the good work