As with many Apple programs, you have multiple ways to launch iTunes. You might double-click the application file on your hard drive, located in the Applications folder. You could simply insert a music CD into your drive, which will automatically start iTunes. For the purposes of this lesson, click the iTunes icon that resides in the Dock.
Christopher uses iTunes all the time. But if this is the first time you've launched iTunes, the program's Setup Assistant will direct you through a series of windows.