Great article Sarah,
lots of great content and amazing story telling! Congrats and thanks for the wonderful tips.
For the formatting aspects you can play with markdown in WYSIWYG here:
https://stackedit.io/editor
And here is a markdown cheat sheet:
https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet
Good luck and welcome to Steemit! : )
Fabio