I've done an in-depth study of story structure with the goal of understanding how to build a resonant, gripping story. I am currently working on a book: The Story Template, that describes in a step-wise fashion how someone may develop a story from an unformed idea.
In the meantime, you can be a volunteer Beta tester! Please find on the next few pages some preliminary shaping tools that may help you take a first step towards refining a story idea. I hope they help! Please let me know what you think here.