Grats man.

To be honest the hardest part of heroics is starting. I think alot of people think gear is the big factor in a group when to be honest its not, 78+ set blues are all you need to get started, my guys even still have a few greens on them. What you have to twink is first your patience, and then your strategy/macros to get everything working to its fullest, it wasnt until I wiped a few times and went back over everything that I found things like realising I had a totem that increases spell haste by 5% (yes I didnt even realise I had this...)

I think as far as gear goes probably the role that is most dependant on it would be the tank, he needs to be able to take as minimal dmg as possible so theres no leway as like a dps/healer role.

Its all just practice, ive now cleared UK, Draktharon and all bosses except the last in Gundrak, its not much but its a start to getting things going, but im finding the more I tune my macros and efficiency the easier they are getting.