[Zope] New to ZOpe & Plone

Hi all, I am new to the ZOpe/Plone world. I would like to know where I can get documentation on implementing Content Management soultons using Plone and Zope as the appserver. How much of Python would be required if I have a create a content driven web site. Is there a demo product available anywhere that I can use to quickly learn Zope/Plone.Python ???? Thanks in advance, Narayan