portrait - student project

Hi! I am an amateur artist. Love to do portraits. mostly use charcoal powder and brush. Enjoyed your class. This is my attempt using just a 4B pencil while watching your classes in one go. What I found most difficult was getting an even finish. Was also wondering why did we not draw the contour lines in the final project. would love to get any inputs/ guidance. I am most keen to catch the right expression/emotion.

Thanks !