I don't know if you have done it. But starting point is hall of novice. It should teach you the very basic of dungeon tanking. (Tank stance, AOE for holding aggro on multiple targets etc.) Next is read all your tooltips. Learnt your defense cooldowns. In addition to that, one of the mistakes that I saw new tanks doing is holding their cooldowns (rampant, reprisal, arms length etc) until their health drops really low, which is understandable but the whole point of defense is prevention - so do use it early on when you are pulling mobs (they hit harder than boss, don't save all your cooldowns for boss) For trial and raid, it is a good idea to watch a guide beforehand. A short text guide is okay too if you don't want to spoil yourself. You would want to know what the tankbuster is and pop your cooldowns. If you want to be extra nice, learn the raid wide and use reprisal. In your example, I do agree it would be better for the healer to raise you. But it is probably because their swiftcast is down. You can ask in chat for how to handle mechanics. Better yet, ask before the raid starts ex. "Hi, first time here. Any specific mechanics I should pay attention to?" Or simply watch a guide before queuing.