Elementalist is not a bad place to start... When the time comes you will want secondary mesmer, monk, or necro.
Try not to post your character till you are level 6-9, level 7 is not a bad place to be.
When you start the game the area you will be in is a tutorial, and eventually you will run across a guy willing to take you into the academy, do NOT go unless you have at least most of your skills and are level 6 or you will have a heck of a time later. Once you go into the academy story line then picks up and you cannot go back to the tutorial.
People will yell at you to SKIP THE SCENE NEWB! But don't, you bought the game for your enjoyment not theirs, so don't ruin it by skipping the story line. Just ignore them, they can get over it they always do!
DYE! Don't let people in presear/tutorial area buy dye from you, save it hun, its worth a lot more on the other side. Don't let someone wear your armor, they can't... and you cannot wear thiers, armor is customised.
Beyond that, dont forget your ID kit and Salvage kit, and unless a weapon is better than the one you have you can just sell it, dont be afraid to sell stuff to the merchant, you wont need so much of it in the end ~_^
Get scale fins for your belt pouch, get someone to help you get a rez sig and GO GO GO GO GO GO! Good Luck and happy hunting ^_^
My In Game Names (IGN): Lady Eviance or Kyla Elric
Edit: someone mentioned googling for a guild, better try here:
http://www.guildwarsguru.com/forum/forumdisplay.php?f=9
Up top there are sticky threads that have guilds that are looking for recruits and all the info you need to know, or a thread where you can put your name down and interests and a guild can pick you.