Redesign of illustration for a book project

I need a graphic designer that can help me redesign approx. 50 plus illustrations for my coming book.
It is important, that the illustrations are aligned in terms of style, and that fonts, colors, shapes are unique to prevent law suits for plagiarism. All IP-rights will belong to me as part of the deal.

I will prefer to receive all illustrations in an editable format that I can access with Microsoft 365 alternatively a free software tool.