How to search for a raid?

Hi, I'm a new and not experienced player, but I'm level 80 and I don't know how to search and join the raid. I tried to click "Display my name", but "Internal LFG error" appeared in the chat. Can anyone explain to me exactly how to look for a raid? Thank you in advance. :) Server: Icecrown

You search for it in City Trade chat or Global chat. You know, talk with people

It's a lot better if you join a guild. One which is opened to new people. Don't go in a pug if you don't know the basics of the game and the raid.