First things first — you have a collection of paragraphs from the most iconic, key parts of your story — the rest are still in your mind, and you’re waiting for the right mood to put them on paper.
But how to structure your writing style? Here’s where I’m going to be controversial with my answer:
At least in terms of what works for me, that’s the *worst* thing you could do with your writing in the beginning. It’s about capturing those random flashes of insight that make you remember later what excited you about this story-concept to begin with.
It’s like that moment in Avatar where those floating, magical seeds come to land on Jake’s arm. He would be ill-advised to shake them off and go,
“Look, guys. I’m trying to complete my mission. Why don’t you come back later?” Chances are, they wouldn’t. And there goes the story.