Illustrations for children's astronomy book

I am looking for an illustrator to create realistic but cartoonish illustrations for my children's astronomy book. The book will have about 30 pictures in 30 pages, of which specific descriptions and instructions will be provided. The illustrator will need to display creativity while bringing my ideas to life in the form of artwork. Attentive to details and available for ongoing communication throughout the project are both desired. Looking forward to seeing your amazing artwork! Attached is a sample of the first 3 pages with a couple of rough general sketches (I'm sure yours will be much better!)