New to MVVM: how to workout the View

I've just got 3 classes: Topic, Example and Exercise. Topic is the main class where both Example and Exercise is linked to. In my window (non-MVVM) I am populating a listbox with my topics, and upon selecting an item in the listbox where the topics are bound to, I am getting the ID of that topic and again populating 2 listboxes (for examples and exercises) related to that topic.

As I am new to MVVM and still trying to understand it, I am at lost on how to convert this to MVVM. Should I have 3 views (3 usercontrols?) for each 3 classes (models)? In my current setting they are all in 1 window.