I’m currently taking a course on personal and story projects called Oatley Academy Live by the Oatley Academy of Concept Art & Illustration. It’s the best course ever if you’re an artist want to do a childrens book, comic or whatever on your own or with a collaborator. It teaches you the basics of storytelling, how to create your own story with a theme, what to look for when designing characters and environments for the story. It’s awesome and you should check it out. Seriously.
The course helps me develop my own story project, which will either be a Children’s Book or a Comic. It’s about grumpy wizards, a kitchen and monsters. It’s really fun to write, and when designing a character it helps a ton if you have a backstory figured out for the character.