LOL that was a hard angle flat down like that, it reqires shading on the top of the hand to show the areas of light and dark, wow, you are not afraid of a challenge, go girly.
So let's see next assignment egg in a box. That is one of my favourites!!! You take a white card or paper and make like a corner for your egg and sit it in. then take a light and shine it at a certain side and when you are happy, you will get the egg, and it will cast a shadow on the paper and below ( it's good to have it on a white sheet of paper.) This let's you really work on shading, and you are not allowed to draw lines, just shade.
Just an idea.