I redrew Lolita digitally. I wanted to keep the roughness and kid-like quality as my original doodle did. One trick on using Wacom pen to draw free hand: if you find the tablet surface is too sleek, put a piece of paper on top of it and draw as usual. In this case, I used a piece of craft paper and it helped me preserve the rough lines.
This is the original doodle on paper: