I'm sure others will tell you the same thing - there is a learning curve with these radios, but we have a few resources to help...starting with
wiki.radioreference.com
You will also see links for our Trunking Basics article (links are always in blue). Down at the bottom are the links for the Easier to Read manual, along with user guides for ARC500 and Win500
Many are moving away from Win500 because the author has been MIA for months. ARC500 is what most recommend, and as mentioned we have a user guide for that software linked in the above article.
Mike