A story in your head isn't a story. It's just a daydream until you actually write it down. So write it down.

Once I have the story in my head, I write it down. The illustrations usually come last.

If the reader is rooting for the protagonist, they'll forgive you just about everything else.

I find that most people know what a story is until they sit down to write one.

If someone offered me a free trip to the International Space Station, I would decline. I like Earth. I like the internet. I like Diet Coke. I have cats. I write about brave people - I'm not one of them.

Thanks to our modern era, facts are incredibly easy to come by. A few web searches for your subject matter, and you have all the information you could dream of.