My best advice is this: Stephen King says reading books is a form of "telepathy" since you are retreading the path of words written by an author. It seems to follow a similar manner of forming mental models in the manner that they directly affect neurology. I would suggest picking up Stan Lee's How to Write Comics and then apply foundational basics of art to the story you are developing. Design is a very large topic overall... it's almost infinite... hmm... learn psychology to get a head start on that path. How we psychologically interpret shapes will help make iterations of anything you are developing as a pre-production far more easy to direct towards an audience.