Seems as though you haven't yet downloaded and installed the Amazon Alexa Phone app... which doesn't sound possible as you need a smart phone to get it set up and you need to download the app to do so.
So I'll assume you actually do have the app. Open it and tap the hamburger menu on the upper or lower left (iPhone vs Android) A Hamburger menu is the three horizontal lines, stacked like a hamburger... top bun, meat, bottom bun kinda thing...
When you hit the menu it opens a list of things - generally speaking it will show "music, video, and Books, and then under that, "Lists"...
Tap the "Lists" one and you will be able to access the lists on your phone wherever you are.