Shoulder exercise suggestions post surgery

Good afternoon,

I had my right neck dissection early December.. My shoulder is still in tons of pain and back of neck, etc..you know the deal.. Raisingg my arm up is beyond difficult to say the least.. Have I done anything to help improve my situation? NO... Tha'ts me being lazy and discouraged. ALso, the pain sucks, so i simply don't even want to do anything with shoulder to aggravate it. Naturally the surgeon suggested physical therapy. I would love to try and avoid it. Any suggestions on particular exercises you have had to do at physical therapy? I see that some of you have went.

Thanks :)