When you first log in to your cPanel, there is an introductory Set-Up guide (Getting Started Wizard) that pops up. Do use it. It saves a lot of time later, and if you do want to change any of the settings at a later date as you learn your way around, you always can.
If you've already dismissed the Wizard before reading this message, you can always go through it anyway just by choosing it in the Preferences box at the top of your cPanel.
Also, Video Tutorials: When you enter cPanel (x3 theme) of any domain there is now a comprehensive set of video tutorials available for viewing, activated by the mini window that appears when first logging in.
There are also handy cPanel tutorials at the official cPanel site:
Comprehensive cPanel manual:
http://www.cpanel.net/support/docs/11/cpanel/