The first few levels...

So. It's my first couple days playing WoW and I have no idea what I'm doing. I have finally gotten past level 10 and still don't know how to use a wand and am completely oblivious to talent trees.
I am in Silverpine Forest on my Undead Priest named Colphy. He's my first toon ever made. He has green skin, no lower jaw, and a black ponytail. I'll buff the hell outta you with my PW:F. I am level 16. This is a couple weeks after BC releases and I'm a noob.
I get a tell. Some people are going to run a then-Elite Island off the coast and they need a healer. OK, cool. I'm in a group with some people and I'm gonna need to cast some lovin'. Rock. I go there and I'm a clicker. I am slow. I die. They give me another chance after I explain that I'd just started playing and we make it through. Great. I rule. I didn't have the quests but w/e I did something with some people and I kept them all alive. They ask if I wanna do SFK. I'm new, but I just did a heal job so I say: "sure. where to?". They are summoning me. I get there and buff all with PW:F and we prepare to go in. They are all new too. Disaster. We don't know what a tank is, all I know is I'm trying to keep everyone alive. They die. Here come the insults. I just hold in the power button on my computer until it releases me from the horrifyingly embarrassing thrashing I have just allowed a lvl 20 Elite Shadowfang to administer to us. I don't play for the next two days. >.<