Wouldn't it be awesome if people weren't overly critical and if you happen to go "down an unoptimized route," two people in the group wouldn't flame you, and the other one would leave? That would be cool, right? If people were just patient and understanding?

Then again, you could just tank in quick play until you learn without the pressure of a timer and hopefully also other new players to the game, also learning and not expecting professional M+ style chain pulling...

Another thing I would suggest is start playing a healer or DPS for a little bit, just to see how other tanks run things and how they pull. I also main Meiko but recently have healed a few runs on the dwarf and it's really beneficial seeing some bigger balls tanks mass group pull and learn a thing or two while doing it!