Check out this page. It has info for the 106, your scanners handheld counterpart.
Pro-106 - The RadioReference Wiki
It has links to programming software available for your scanner, as well as links to a Quick Start Easy Programming guide.
You're going to have to get a radio reference premium membership, buy a programming cable, and download some software (there are 3 available for your scanner, all with free trials).
With the RR Membership you can upload whatever channels and systems you wish to monitor straight off of this site and makes programming about 600 times easier than attemping by hand, expecially with this being your first digital scanner.
Let me know if you need any help or have another question.
Scan On!