I’m including 2 versions of the George Clooney portrait. One is a ‘work in progress’ which I’m putting up here to illustrate the steps involved in the shading process. In general it is much better to build up your darks by applying more light layers of graphite. The portrait tends to have much more depth and a more satisfying overall look when it is done this way. When we just press really hard especially with a soft pencil we achieve and instant dark but it tends to look garish and over the top.
If you have the patience to apply 5 or 6 light layers I think you will be very pleasantly surprised by the look.
Good luck to all.