Games Workshop today launched the new Age of Sigmar site where you can download the rules for free. There is a lot of prep going on today as the new version of the game is all up for pre-orders tomorrow morning. However, with the rules free today.... you can jump right in and start checking out the latest.
Here is the new Site
Free Core Rules for the Age of Sigmar
Here is Duncans Introduction into the game.
How to Play with Becca Scott