Here are some great resources for learning how to use WordPress.
The Official WordPress User Manual – https://make.wordpress.org/support/user-manual/
This is a living document created and maintained by the amazing and dedicated wordpress.org team.
Easy WP Guide – http://easywpguide.com/
You won't find any talk of HTML, PHP or creating WP Themes here. What you will find is an easy to follow WordPress manual that will WordPress-Help you understand the basics of editing your site content.
Codex for the WordPress Project – http://codex.wordpress.org/
The online manual for WordPress and a living repository for WordPress information and documentation.
WordPress TV – http://wordpress.tv/
Videos from WordCamps and more all about our favourite CMS and blogging platform.
WP 101 – http://www.wp101.com/
Some free but mostly pay access video tutorials about learning the ins and outs of WordPress.