Yep, you started with an idea. Where it came from, you're not certain, but it bubbled to the surface at the strangest times - while you were putting on your slippers and getting ready to tune out the day - or while you opened your eyes the next morning to check out the weather.
You planned to have a barbecue and it was pouring rain. Then your idea flashed across your mind's screen again. Since your barbecue was cancelled, you thought about that idea more, took your time, and built on it. You had time to write an outline about your new story, perhaps your future best-selling novel.
Okay, you thought, what would happen if you wrote a story about that homeless person who strolled the streets trying to find someone to help every day, and some well-meaning passer-by handed that homeless person a cheap lottery ticket? And you guessed it, the homeless person won thirty trillion dollars. What would he do with that money? How would he change the world? Would he give it away and become homeless again, or buy himself an island and send for the world's homeless people to live there with him?
This, my friends, is the ecstasy of writing, when an idea turns into a magic story filled with twists and turns, sparkling visions, and boundless possibilities. Enjoy that first step of your story. It is exciting. It pushes you forward, fills you with anticipation, suspense, and inner power. Revel in it my friends, because agony is next.