Answer:
You want to make sure to start off with a strong thesis sentence that will hook the reader and make them want to read more, and you want an interesting topic. There are many ways to format a story, the most common and logical is chronological order, which is when a story is told from the first event to the last in sequential order. You can also tell a story using flashbacks, which allows you to tell the story in chronological order but include flashes back to past memories outside which are outside of the story line. When it comes to nonfiction writing, you are describing real people, places and/or events. You may need to take some time to research this factual information to ensure accuracy. Look online for pictures of your setting(s), and make sure you have enough evidence and supporting details. However, this doesn't mean that you have to sacrifice an engaging story just to tell the facts. You can describe them vividly by including a strong description of everything.
Hope this helps, good luck :)