Hello, I hope you are very well. I would like to work on your project, I have illustrated 3 books on freelancer, a book of poems for adults and two books for children, I know that it is little experience compared to other people, but that means that I have to put more effort into my illustrations to be able to stand out among So much talent, not that it bothers me, on the contrary, it motivates me to do an excellent job. You can find samples of my illustrations in my portfolio. I can use both digital and traditional techniques, among them I like to work with colored pencils, I think they give a finish that children really like. If you want I can make a sample illustration, we can reach an agreement that benefits us both if you are interested in my work. I hope we can talk soon and I wish you the best of luck in your project.
PS: I have seen the illustrations of the authors that you mention, I am sure that I can create a style similar to the one you are looking for.