That's fine, but you'll run the risk of being somewhat confused and also potentially being spoiled as to some very major plot twists. I'll be running off of the book-canon, so it won't be [i]exactly[/i] the same, but if you want to stay relatively clear of spoilers be warned.

Also, you're going to want to read the wiki. [url=http://awoiaf.westeros.org/index.php/A_Song_of_Ice_and_Fire#Back_story]This[/url] is a good jumping-off point.