She's got the blues

This is just a doodle! Incredible! Even when just doodling you definetly seem experienced in drawing the human head, as your proportions are nearly spot on!

I can try to say something constructive, but as it's just a doodle I don't know what I could say as sometimes I don't go back to old sketches and work upon them. You may be different.

As it's clearly a portrait of a black woman, I think that unless she died her hair, you could be a bit more... pressured with the pencil in creating the dark hair look? I'm not seeing contrast between her skin tone/shadows and her hair, and that may be something you want to work on later.

Other than that, excellent! Keep doodling!

Cheers!