You start off the game only able to use a few weapons. When you make it to a major city you can learn from a master weapon trainer how to use more weapons. However, some classes cannot use certain weapons. Ie, Hunters cannnot use wands and maces. Priest cannot use swords etc.
I suggest bookmarking www.wowhead.com. Since you are also a low lvl character I'd also suggest re-rolling on a different realm and play with one of us. Also, don't just pick your race based on looks. Check out this page it shows you the different racial attributes that give some classes and added bonus. For instance, most people who play a hunter choose a troll because of the passive "Your chance to critically hit with Bows is increased by 1%" and "Increases your attack speed by 10% to 30%. At full health the speed increase is 10% with a greater effect up to 30% if you are badly hurt when you activate Berserking. Lasts 10 sec. "