On the left side of the iTunes window, you will find the categories of Library, Store, Shared and Playlists (fig 1).
The Library (fig 2) arranges the music by name, title, artist, album, and genre.
To change this, go to View > View Options (fig 3) or command J, and check the sections you want to organize your music (fig 4).
Podcasts are located under the Library category (fig 5), and are obtained by downloading them from the music store.
You can get there by clicking Podcast Directory (fig 6).
You can change Podcast settings by clicking the Settings button (fig 7)(fig 8).
Movies, located under the Library category (see fig 5), hold videos that you download off the Internet, or from a DVD.
The Party Shuffle (fig 10) automatically chooses songs from your library or and playlist that you have created.
You can change the source by clicking the source tab at the bottom (fig 11).
The Radio (fig 12) streams music from the Internet and divides them into different genres and radio stations (fig 13).
The iTunes Store (fig 14) is where you can buy music and download it into iTunes. To do this, you have to sign in and create an account (fig 15).
You can make a playlist (fig 16) by clicking the plus sign (fig 17).