Really need help with group comp and few other questions

[StephenMB]

Holy cow, very difficult running 5 different classes lol... and I am only on lvl 14. So I just deleted those 5 and created 5 Druids. I figure that gives me a lot of flexibility... I an go all DPS, I can go tank healer and DPS and so on and not really need to do much more than click a button it seems. I am sure there is a lot more to it but seems the easiest way to "learn" the game so my next teams aren't such a steep learning curve.

oh, and what is the MOD that tells me what heroic dungeons I can hit and when? Like my druids are almost 14, when can I start doing instances and where? Is there an app that tells me that?