I have some of the steps I took while doing this piece. Also, I have a way better version than the one I posted yesterday. It's at the bottom.
Step One: Linework. I used brown India Ink and a calligraphy pen.
For these last two I made her look a little more like a woman instead of a really pretty man. I also made her arm and the bird's wing break the box a bit. Her eyes aren't as weird looking, and the city looks a bit better. I replaced the rolled up note (which looked like a giant joint no matter what I did) with an unrolled note.
In this one I adjusted the saturation and put more detail into her eyes, lips, and the note.
I think there's still more to be done, but I'm happy turning this one in.