Black and white ink line drawing for book cover

I'm planning to self publish two or three books using a mainstream online platform. I require at least one illustration for the cover, but I may want several other illustrations to evoke the mood of each chapter or section.

I am strong on the idea of black and white, almost just ink line drawings, like Picasso's sketches which are almost unfinished.

Main character is a young woman who is attractive but rather insecure. We might see her from the back, walking on a street at a distance, or staring pensively out of a window.