Hey there, you are quite diligent with all those weekly assignments π nice discipline
So, as for this las portrait piece, I have to say that the lighting in the reference is complex as part of his face is in harsh light and the other in shadow so showing the forms is more difficult. Also he has messy hair, a tilt to the head that ended up offsetting the tilt on his left eye in your drawing and an open mouth with teeth showing making things even more difficult.
Overall I think you did a very good job on this
Lower right eyelid seems a bit too bright and shape of the brows is a little different. Also, you draw the outlines of his upper lip when, as they are catching more light, would probably work better as implied lines
Cheers