You don't sound dumb, dragon! Check out the very first post. Giddy wrote down a ton of info, but you can scroll down to the nationalities section for a quick and easy recap of all of the nationalities available. Also, if you click on the big blue WHEEL OF TIME link at the top of that first post, it'll send you to the actual Wheel of Time guide for more info on the world, the people, the roles you can take and all of that.
Not sure what other things there are if that makes sense. My channeller is a Wilder from Ardon and according to Giddy's nationality description, Wilders are hardworking people so I was thinking of making my character a person who likes to help her friends wherever possible. So a support and protector if that makes sense.