I use the bracket and back slash keys for my targeting. Basically, my right hand is my movement/targetting/camera hand, and my left is for hitting skills, space bar, and calling/target hitting.
It's a good set-up because unless your a midget with really small hands, your not really stretching them out too much. And my set-up spreads the keyload out evenly between both hands instead of the left doing most of the work. You will find yourself being a little faster this way too.
To the OP and anyone else new to pvp. DO NOT go into the novice arenas with the goal of winning. Got there and spend a few hours just fighting. Don't worry about wins or losses. Try and observe as much as possible. When you die, click one of your teammates and watch what they do.
Just keep on fighting and you will start to see the big picture, and the action will begin to slow down as well. And don't get discouraged by the tards and aholes. There are less and less of them as you move up to the harder arenas and the high end pvp places.
Another good thing for tips on pvp is get to know who the really good pvp'ers and guilds are and listen to what they say on the boards. They will give out a lot of good info and you can trust the reliability of their information.
DO NOT ever listen to a person who does not pvp or say they have some uber build they came up with on paper but haven't tested it in actual gameplay.
Oh, I almost forgot, always always always give a gg when the match ends no matter the result. Just because someone else is a jerk doesn't mean you should stop being a good sport
