Shaded the part of the forehead and drew the eyebrow. The eyebrow is basically made of thin short straws going in the same direction - towards the left. You can add a few very dark ones occasionally. You can add some white ones as well by erasing thin lines with your kneaded eraser. I haven't done that on this drawing as I don't feel it's needed, but if you choose another reference you might see some white straws in the eyebrow depending on the light.
I am almost done by now, just need to work a bit more on the details and add the hair.