You can download a complete iPad User Guide here: http://manuals.info.apple.com/en/ipad_user_guide.pdf
Also, Good Instructions http://www.tcgeeks.com/how-to-use-ipad-2/
Apple - iPad - Guided Tours
Watch the videos see all the amazing iPad apps in action. Learn how to use FaceTime, Mail, Safari, Videos, Maps, iBooks, App Store, and more.
iPad How-Tos http://ipod.about.com/lr/ipad_how-tos/903396/1/
You can download this guide to your iPad.
iPad User Guide for iOS 5
There is a free app called iPad Secrets in the App Store.
That's certainly worth taking a look at, for a beginner.
Also check the iBooks store for Macworld's iPad Starter Guide (Third Edition). It isn't free, but relatively inexpensive, $1.99 I think. You may find other titles in the bookstore worth considering).