Just follow instructions with the quests, make sure to communicate well with other people, look up on items from
http://www.thottbot.com, and of course use the main website for help too. Also, when picking a class you can also check the site to see what you would like to play. I myself play a rogue because it's fast and intense action, but you might like something else like a caster such as a mage or a warlock, that can do heavy amounts of damage from great ranges. It's all your choice, go to the main website and read up on the different classes and make sure to read the beginners guide to the game.
Have fun,
Just don't get sucked in like I did.