Installing and upgrading help

You use it with reverence and patience.

There is also a book you can download: http://docs.moodle.org/en/Using_Moodle_book and here is a pretty good demonstration for Moodle with good visuals (I like visuals): http://moodle.org/other/Using-Your-Moodle.pdf

I do have a question, though - If you don't know what it is or how to use it, how are you certain you urgently need it? There can be a bit of a learning curve, so if you're hoping to quickly replace your current CMS you need to be aware of that.

What CMS are you using now?