For artistic purposes hands can be put into one shape, especially for short poses or you can divide the thumb and index finger and make a basic shape for the rest of the fingers which adds support. There are 27 bones in the human hands which make it one of the most complex features. It's helpful to think of hands as equipment that do motor skill tasks for example seeing them as a hook or tongs or scoop or weapon can help visualize how to draw them.
Drawing lots of hands and feet from life, not photos will help you improve.