I have a some experience as a tank, but I'm not sure if I've got it right. Often times, it's like I'm still DPSing. I know that I approach enemies first and gain their aggro so they can focus on me. A few times, I could lose the aggro (especially as marauder) and they go after the other members. Then it becomes something like a free for all; everyone just kill anything. The times I've died as a tank feels out of my control.

I have very little experience as a healer. I have an idea of how it works, but I have questions: How do I use "protect" on everyone at once (it seems like it'll go to everyone in the party)? How can I specifically (quickly) target party members to use "cure," instead of targeting enemies? As a healer, I know I should focus on healing the tank, but how do I manage healing everyone, while also avoiding over-healing. How can I gain experience killing enemies, while I'm off healing everyone. It almost seems like healers will gain the least amount of experience.