I think it's good for a rough sketch. You could add more detail to make it more realistic, like tiny lines on the palm and the knuckles. The pinky looks a little bit weird to me though as well as the pointer finger. It kinda looks like you started with a fist and added on the pointer finger, lol. If the pinky is supposed to be bent, I would say make it shorter and add lines to define the knuckles. I would also add lines to the palm where the pointer finger is to show folds in the skin.
