I see, in the first pic, you are trying to master the difficult art of "Lid" skiing. Unfortunately, your hands are too far forward and your back is curved into a C shape. This does not permit you to actually ride on your lid but only on your upper back.
Remember, Stay out of the front seat here, hands back and low, neck and upper back straight and get up on that lid. Also, this technique is best saved for moderate powder days. Then with a straight face you can say you did ski neck deep powder!!!
Good luck and post more pics. We need to review your progress.