Oh don't feel bad about this, Chris. I'm happy that you reached out to help.
The easiest way to add a sitemap to a project is to search for it in the Quick Add field in the upper left. Once you have added it to your canvas, you can click the "populate from project" button, and it will display the structure of your project.
Let me know if that works for you, Chris, and don't think twice about asking questions. We are here to help!