PRO-106 (PSR-500) way to go!
Welcome to RadioReference.com, you've found the best place to get help with this stuff.
Recently purchased Pro-106 along with programing cable and subscribing to this site.
Just getting the USB cable working is a big challenge for many people. I think GOOD step-by-step documentation totally is lacking from the manufacturers on this stuff. It is not you; most, if not all, of us had to go through these learning steps.
My suggestion is to get software to program the scanner. While it does not do it all for you, it makes the steps much easier. Personally I'd get WIN500 (
www.starrsoft.com), but there are several out there to chose from. Read more about that scanner
here, and you'll also find more links for things like programming software.
I researched enough to know buying a digital scanner was keeping current with today's technology but I don't quite get how to program this thing.
Arguably you have purchased one of the most difficult scanners out there. In order to monitor the most complex systems being used, it requires a complex device. Everything these days is computer driven, and computers are 'programming driven'. It's quite a dilemma.
I've been able to learn this stuff because I have learned along the way from crystal controlled, to programmable, to trunk trackers, etc. It is really tough to jump in to where we are now without lots of background. Certainly your computer/etc knowledge will help, but the radio aspects of things will likely be all new territory.
One way to approach this could be to get some software working (so you can read and write to the scanner), and then find someone in your area with the same scanner. They could share their scanner profile with you. You'd just upload that to the scanner and at least be listening. Then you can learn and customize while listening.