Watching videos is only part of the learning process. Sissy told me to explain you basically need to experience the fight a bit. As a healer you need to learn when to cure bomb, when to dps, and when to shield for tank busters (most likely limited to salvage and the like) Also a big thing healers tend to have a problem with is interrupting casting raise to dodge something. I was kicked once for telling a healer they could of moved and not raised a person since that lead me needing to raise the healer in question, ofc I reported kick abuse (and premade on top of things)