As for learning how to heal as a new 80, one suggestion if you dont want to get abused by people you dont know for not having full 232 or 245 gear (it happens more often than id like even on my main which IS full 232) is to run random heroics with your guild.
Chances are by now you already have an 80 or are familiar with the people in your guild and so if your just learning how to heal or just out of practice having a geared tank and dps know what they are doing is a massive help.
That being said when i make a toon to either tank or heal and it hits 80 im EXTREMELY comfortable with my guildies. and once i start to get the hang of something i ask my higher dps people to pull threat or get themselves hit a couple times to make sure i can raid heal or taunt at the right times to get me ready for pugs.
That was my suggestion as for new 80s
as for Aliena's costume....
Selene from Underworld (if characters are ok)
Me: "Why did you gem spell pen?"
Unhappy Heals:"Tanks were resisting my heals"