Once logged in, you will initially come to the Dashboard page. This shows information specific to your access rights.
You will see a table of Actions Required as well as a table of Auctions. You can click on the links (e.g. Pending Bidders, Pending Offers, etc.) within these sections to navigate directly through.
From the Dashboard you can use the navigation links at the top of the page to find your way through the admin site. Once you have navigated away from the initial page you can get back to it by selecting Dashboard in the top bar, and clicking Home in the dropdown menu.