Salesforce Beginners Guide

Kindly use the below link to sign up Developer Edition to get hands on experience

http://www.infallibletechie.com/2013/01/how-to-signup-for-developer-edition-in.html

Check the below workbooks for practice

Workbooks:

http://www.infallibletechie.com/2013/01/link-for-creating-warehouse-application.html

http://www.infallibletechie.com/2012/10/recruiting-application-in-salesforce.html

Cheers!!!