Your best bet is to read a few of the messages on this board and get a general idea of how Alt.binz works. Also look in the Help section and see some of the questions people have asked in the past and the answers given.
Next I would, (and I did) run through the Setup and open all the items in the Setup Section. You will learn a lot from that. It sets up your Connections, your download folder, unrar folder, pars2 folder, etc. Just click on each one and you will get a general idea of what you need to do.
Last of all you need to read through
http://www.slyck.com/ng.php as it tells you everything you need to know about Usenet, Pars2 files, NZB files, etc, etc, etc.
Slyck's is the best place for Usenet and other areas of interest, but the explanation of Usenet is probably the best available at the present time. Not alot of reading but will take you through everything you need to know.
Hope this helps...