Study of a Rembrandt Portarit

I like to make portraits and the best way to improve composition and values results is to study art masters. I always liked Rembrandt for the depth he inspired with his portraits.

I did not love the final result in this study, I could not efficiently reproduce the softness of the skin and the lighted areas in relation to the dark and more contrasting areas, even after 2 hours of working I did not achieve what I wanted.