Not a good year for Philly skiers and dislocated shoulders. Did the same thing in Jackson Hole in January, only i got one more day of skiing. It s__ks!
I presume that you got x-rays, the joint was reduced and the ball and socket put back in normal place. Your injury is more serious due to the humerus fracture. In JH I was treated by an emergency room physician who told me the associated damage was very minor. I saw an Ortho shoulder specialist when I returned. The follow up x-rays looked promising, but he advised that if issues continued following therapy, an MRI and a medical procedure may be required. It sounds like you have been told you will need a surgical procedure. My understanding is that a 4 month recovery is typical if you undergo the knife.
My shoulder recovery is progressing to the point where I've skied following 6 weeks off, but certain positions remain very painful. As your fellow members of the bar would say, "the jury is still out".
The good news is that once the joint is back in place, pain and limited mobility go away quickly. You will not have much strength at the extreme ranges of motion.
Give me a call when you home and we can do chinse lunch somewhere.