The biggest qq for me is fundamental class changes, learn to cope with having some mechanic you have been depending disappear. That's just how it is, adapt and move on.

The main issue I see for people starting is getting over leveling, forget about leveling and just do it. Take that time to hone your macros and learn isboxer or whatever. Get used to the follow and iwt stuff, group movement, fear bomb recoveries and such. Just like single boxing, the game doesnt start at level 1, it starts when you are dipping your toes into heroics ilevel.

You need to get over the lazy macro level to really 'succeed' and get some return on the effort needed to box.

Add people to your bnet friends list and get some socialization time in during the game.