I have always played World of Warcraft on my own; mainly because I don't play enough to build relationships with other players, and because I don't feel committed enough to having other start relying on me to log in every day / week.
Lately I am getting a little bored and feel like involving myself in the multiplayer parts of the game, like the dungeons, would make it more enjoyable.
Thing is, the game is filled with people who spend hour and hours playing and have tonnes of experience. I haven't used the dungeon feature before and I'm not that experienced in the game. I want to try the dungeon feature, but I don't want to end up annoying the other players by not playing well enough or as expected. I don't understand all the terminology that people use referring to items, skills or tactics. I also don't really understand a lot of the game mechanics that are more important when playing with others, like threat. I'm concerned about ruining the dungeon for others, which would deteriorate my interest in the game.
If I play a dungeon with others, what is expected of me? I suspect each class has its set of common tasks, but I don't know what they are. Are there some general rules / expectations that I can read about before I try it out? What is the worst thing I can do if I give it a go?