I've basically been doing nothing but healing for the year I've played and I finally started branching out to tank and DPS for the past month or so.

Even when I inform everyone at the beginning of a dungeon that I'm new and learning, it's still kinda nerve-wracking because the spotlight is basically 100% on the tank for most of the dungeon. The spotlight only ever moves if someone blatantly fails (healer couldn't handle the amount pulled for example) or someone does something stupid (impatient DPS pulls extra for the tank).

Everything I do is clear and visible to everyone, which then leads to an awkward form of performance anxiety because I don't want to let my team down, disappoint them or waste their time.

It also doesn't help that every duty finer party is under the risk of having some volatile child with a frail ego who either decides to not heal me, or pull extra to get us killed, or just stop doing damage, because I'm not pulling enough, or I'm pulling too much, or I'm not using enough cooldowns, or I'm using too many cooldowns, or my glamour wasn't to their liking, or because they don't like my character's name, or because I said hello at the beginning of the dungeon...

I guess it boils down to having too many awful past experiences with the players of this community, at the end of the day.