Yes.  There is an excellent book that explains how Joomla works, how to organize content, and what all the terminology means.  While there are plenty of good free Joomla resources out there, we have had great success using Barrie's book.

Joomla! 1.5: A User's Guide: Building a Successful Joomla! Powered Website (2nd Edition) (Paperback)

• Author: Barrie M. North
• Barrie M. North (Author)

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  Paperback: 480 pages
• Publisher: Prentice Hall PTR; 2 edition (June 1, 2009)
• Language: English
• ISBN-10: 0137012314
• ISBN-13: 978-0137012312

Available online at Informit
Available on Amazon

Don't have the time/interest in learning all this stuff on your own?  Let us create your site for you!