another thing i was going to mention is that its not like wow has persistent death... just go give it a shot but yeah get in a pug or 2, watch some videos (i suggest the tankspot ones theyre very well done), and run some more heroics for the new badges and get some nice gear that way then go wtfpwn some naxx. theres a lot of restrictions with only 1 tank and 1 or 2 healers but you should still be able to find something fun to do in there.