You may be more familiar with the PC / Windows environment. The good news is that most of your PC skills are transferrable to Mac - you just need to know where to look. In this activity, we will explore some of the common features of Windows, and how they can be performed on a Mac.
Access the Sound preference pane for more options relating to your sound devices.
Access the Network preference pane for more options relating to your network interfaces (Wifi, network cable, etc).
Access the Desktop & Screen Saver preference pane to change your wallpaper.
From the "Get Info" window, you can see properties of the file, where it came from (e.g. an email), choose what program to open it in by default, and so on.
This is confusing at first, especially as Windows keyboard have a 'delete' key which is distinct from 'backspace'. To emulate the function of the 'delete' key on a Mac, use Fn+Delete.