When you don't know how to start... that is a familiar feeling for me. If I try to draw, I don't know how to start. I jus stare at the paper and cannot envision where to draw anything. But with writing I can always start from where I am.
"I NEED HELP!" My little brother had knocked over a stack of boxes, and now they were in the way when he tried to open the door. "I'm suppose to be getting over my fear of the dark, but I don't know how to start!"
Add some energy to the story by making it so that the people involve are making progress toward a goal.
Add sensory words. Google this: sensory words list
Add conflict that creates tension. Who is in conflict with whom?
Give a resolution to the conflict.
That's your recipe... your formula. If you have conflict, you have a story. Make it a good one!