No problem! First off these look good. The thing to remember with shadow mapping and finding shadow shapes is that they are shapes. Don't think linearly about them but as larger shapes. So the steps for this exercise are simple (not easy but simple!) first identify all the different value shapes. Lightly outline them. Then I recommend making a value scale with your two darkest colors representing your shadow values and the other three representing your light values. Then using that as a guide, fill in your drawing. I've attached a rough approximation of the process. I hope that helps.