You can see the learning sets here in learning mode Karteikarten. With the function Lernmodus wählen at the bottom right you can select another learning mode, e.g. Lernen, Zuordnen, Testen etc.
Have you already registered at quizlet.com and downloaded the app to your Smartphone or IPhone? Then you can also use the learning sets directly in the app. Click in the left column on Lektion ... or in the learning set on Dieses Lernset ansehen.