I took photos of this painting as I painted it today.
First I did a general drawing and blocked in what I saw as the darkest areas.
Below I worked on the eyes, because I really can't see what I'm doing unless I can see what the eyes look like.
Trying to move things along, I added in some black (I make my own black).
Here I made a few corrections.
I started blocking in her clothing.
Towards the end of a painting, I enjoy leaning back in an armchair and bringing the painting right up close to my face, so that is what I am doing in the following photos.
Let me know in the comments if you have any questions.