Google Apps has a great line of helpful training and information videos online to help you get started with Email, Calendar and Docs. Conveniently, they’re all in one place:
On the left side of the page, you’ll see links for all of the various Google App products, including Email, Calendar and Docs. You’ll also see videos for Google Talk and Google Sites, but be aware that the College is not supporting the use of those two products at this time.