I often say to my students in workshops that if they are trying to find literary inspiration, they should not go and read novels, because novels are more appropriate for series. Where as they should read short stories - that's the right format for you to be able to actually display the narrative in a film.
I don't ask my students to have studied film or any education in general. What I ask them is to come and sit and tell me a story, and the way they choose it and tell it, for me, the best criteria for whether they are right for making films. There's nothing more important than being able to tell your story orally.