Three stages of blocking in the basic tones of hair and face. There is much to do with tones and contrast, along with the minute details that refine the 'likeness' which is important to the subject.
A person is not happy if a portrait of them is not a good likeness. It is also important to point out that, when we look at ourselves in a mirror, we are viewing a reversed image. In most humans, the left and right side of the face is slightly different, and this can leave a slightly false impression of how they look in their mind.

How often do we look at a photo of ourselves and not think that we do not resemble the image we have in our mind.
Another point that artists will be aware of, is how different we can make a painting with just a slight change of tone or angle in the shapes.
I am not an expert at portraits, as this is only my fourth attempt in my artistic career but I am learning fast!

I shall leave these areas for a few days and work on refining the shapes and tones of the scarf. I shall add the highlights of it at a later time which will give a better impression of the texture of the material.