This was one of the Betty Edwards exercises that I rather liked; copying a Picasso self-portrait in charcoal. It’s the 1899-1900 Barcelona self-portrait, if you’d like to look it up for a comparison.
I rather like how I re-interpreted the facial features and the neck even when I was trying to copy faithfully. It was also a great exercise to get a feel for what charcoal does well and not so well.
Have you ever tried to copy somebody else’s image of themselves? What have you learned?