More experimenting with Illustrator and the tablet, using some custom brush strokes I built. I traced this pic off of reference, as practice and to see whether the strokes could handle her eyes.
... then I went a little nuts coloring, since I always enjoy that part. The first color pic used the thick-lined original sketch. twoflower suggested the lines might be too thick for a color pic (though the B&W looks great). So, I did another one with very thin lines in the hair. I think it worked, mostly. I also really love the texture in the irises.
Someday I'll learn to make dramatic shadows, but meanwhile, here's a neutral glowy look.