Thank you! I asked an illustrator I've worked with before to read the story, and she designed it on her own.
In the article below, I share a more collaborative process, where I shared a vision I have with her, then went through a couple rounds of revisions.
Regarding target audience, that was the nice thing about Medium for me. A big part of the marketing was that you can write about whatever you want instead of specializing. I'm still figuring it out, too. Hang in there!