You can make your own story with "+Story", or you can import a template.
Your story will be saved in your browser. This means you have to use the same computer and the same browser if you have to stop and continue later.
If you have to use a different computer or share your file with someone, click "Archive" and then put the file somewhere safe. Open it later using "Import From File"
You can style your story by editing the stylesheet.
Once you're done, "Publish to File" and upload it as media on the course website.
Post a link with your File URL in the comments here! (Hint: check the end of the Basic HTML lesson for a reminder)