What Anaogi said. Just head to Antonica or Commonlands and look for a ginormous blue circle on the map. The PQ is called "Hack 'n Slash." And keep an eye out for General chat. The community's good at letting folks know when it's active. Good luck!
Here's a great write up on what to do - if in doubt, go into General Chat or SHOUT (which everyone seems to use anyway LOL) and ask for help - great bunch of helpful people in these things http://eq2.eqtraders.com/articles/article_page.php?article=q300&menustr=080000000000