I learned the pulls in AK by just running it and letting the people in the group know that I was still learning the pulls and more often than not they will be willing to tell you pulls and strats.

as for CM/Prae, if you queue up in DF you'll have a second tank, sometimes you'll get one that knows what he's doing and you can just run OT and watch him to learn, sometimes you'll get a complete douche and you'll just have to wing it and ask the rest of the party.

I wouldn't worry too much about it though, just let them know you're learning the pulls and if they want to be dicks about it, fine, they can move on and do something else.