I did this sketch/still life the other day. The painting in painted directly/opaquely on grey paper primed with shellac. And it seems a slight bit off to me. Any recommendations on improvements? One thing I have been thinking of is if the edge from light to dark is too sharp. Second question: does anyone here have an opinion on whether or not I could sell this? And even what price it could be sold at? The piece itself isn't very big (a bit under 10x10cm) Thanks in advance to anyone answering