Before you actually encounter the heroics, you must do the prequests.  Here is the guide.

None of the other heroics give jewelry, although Hoth gives a sick snowspeeder ITV (the Secrets of Syren is superior, although you can have both and have five travel points) and the new heroics give some cool shit.  I have done Hoth, although no member of my family have done the new heroics.  My mother is unlocked for all nine heroics (leave it to a 69 almost 70 year old grandma to be the power gamer of the family, my younger brother has two sons), although my younger brother and I are not unlocked for any of the three new ones, only the six old ones.