i personally never needed to watch a guide for any dungeon/raid/trial and just went on intuition,but i AM AWARE,that this is most probably due to me having playing multiple mmo's in the past,i DO get hit by mechanics sometimes,as some mechanics arent that intuitive and require experience to know what to do,however "dying" shouldnt be taken as a stressful event,as you'll most likely be ressed,and even if you wipe,it will be a learning experience,unless you are going to do savage difficulty,i doubt you are going to have any troubles,gear can also be a big issue that can make you win or wipe,as is reckless players,like a tank taking entire rooms of monsters rather than a few at a time.