Hi Susan. No worries—you've got this!
In your original file, you used states to show and hide your content. But if you want an even faster and easier solution, layers may be your best bet. I've attached a new version of your first slide to show how that can work.
On the base layer, all that's there is your button and bullet list. There's just one trigger here: clicking the button shows the "pop up" layer. The "pop up" layer has your supplies list and a second button that sits over top of your first one. There's a different trigger on that button: clicking it hides the "pop up" layer.
So by simply adding a layer and duplicating your button, you can make this work with just two triggers! I hope that helps and let me know if you have any questions.