How can I turn off the tutorial on the iMac air and then try to learn how to use it myself?

[iMore Question]

I just got my first iMac and want to try to learn to use it myself but I can't stop the tutorial from running.

 

[Just_Me_D]

Command-Shift-Option-Esc (hold for three seconds)

Other OS X keyboard shortcuts can be found via the following link:

OS X: Keyboard shortcuts