Drawing fingers are tricky. You have to make close observations to where the shadows are lying – is the shadow on that finger or on the one below it?
Fingernails – to make them look their best, draw the skin around them instead of drawing the nail itself. A better representation of the nail is created this way.
I used a B pencil in the darkest darks, HB in the mid-shadows, and 2H for the mid-tone values.
Next time on The Drawing Board, the shirt.