here's a screenshot of what it looks like when i try to use the premade campaign button. i'm very frustrated and confused.

Because it's not available as a premade adventure and was never advertised to be.

All "premade" does is create the Campaign under My Campaigns and pastes some intro text and notes in for you. That's it. 

You can just do this yourself by creating a campaign, copying what you need, and you're done. Same result, in minutes. 

As for using the Maps tool - all of the adventure's maps are included for the Maps VTT. All content from the book will be available in the tools. 

ooh! i had no idea, lol. that makes sense. thank you!