Hello,
my name is Liliana, i have over ten years of experience as a designer, and what i like most is to illustrate,that's why i like this project.
Please, visit my Freelancer portfolio https://www.freelancer.com/u/webpolis.html
to see some of the illustrations and designs i made, in order to evaluate my work.
I can send you more samples, if you want to.
I use Adobe Illustrator for this kind of projects, i can deliver you the cover as vector format to print, and saved as any other digital format you may need, like JPG or PNG, for example.
I found this project really enjoyable and interesting, and would like to create an original and professional cover, that represents your book.
Hope we can work together, please, contact me if you want to talk about the project, or if you want to see some more of my work.
Best regards.
Lili.