Hey dude, just follow the quests and they will pretty much take you through it. I'd mix up the questing with dungeons too, always be qued for a dungeon, take pops when you can and then make a judgement if you think the group is any good or not. If you don't think youll be able to finish the dungeon leave and go quest, if not stay with the group for mad xp/lewts ^.^ I'd completely ignore pvp to level too.
As a rough guide hit up Elwynn Forest -> Westfall -> Redridge Mountains -> Duskwood -> STV I forget what comes after STV sorry xD but you'll be able to figure it out.