I think people really overestimate how much adventuring/daily grinding they need to do before they can hop into dungeons. I did a lot, but in hindsight it was totally unnecessary - VERY few parts of the dungeon experience are simply too hard from a gearing standpoint, in fact with just adventure gear my group DESTROYS dps checks in dungeons, it's trivial, the mechanics are what take work.
Just get a group, learn to interrupt, and you're set. If you're wiping, I can almost guarantee either your healer or tank or something is astronomically bad, or you need to interrupt/execute mechanics better.
EDIT: They WILL take work though and time, just like whoever said it was like wow raid level of learning mechanics. I've got archived streams of working on several of the zones, and successful runs on a bunch of them.
http://www.twitch.tv/theyanger/b/542095908 Skullcano for 3 hours - our current target
http://www.twitch.tv/theyanger/b/541326794 KV first time we silvered - you can see how forgiving the timer is there.