When you first open Complete Anatomy, you will see this screen, known as the Hub.
Depending on the user type you selected on sign up, you will see a slightly different version of the Hub to tailor to your needs.
You can also access recently viewed content via the Recents panel, which pulls in from the left.
You can go back to the Hub anytime from your workspace by selecting the Hub icon in the top-right of the screen:
You can also access the Library, Store and your Settings by using the side menu in the workspace: