the shading is looking reall good for the face so far just add a bit more detail to the nose area. one tip dont use pure white for eyes. eyes arnt pure white in human eyes there more milky color it prooves it when you see that shines are brighter then the white in the eyes.
Will it be a two faced jester or a jester with a mask? I would consider adding either a warm tone to the skin or maybe some green in the hat to help with contrast. Are you thinking about any hat colors?
here karst 2 options roll from mine or use it as a refrence btw milky white is a not clear/pure white i added eyes redid nose added mouth for you to see experts sign your work when you post it
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SlothMouse
Here is one of them