impingent & scapula control weak, Best Exercises?

Hi i injured my shoulder skiing about 4 1/2 months ago and i am still getting pain with it, my friend who is training to be a physio said i have got an impingent of the shoulder & my scapula control is weak, the trouble is my friend doesn't know any exercises can anyone let me know what exersises i can do to help it recover

Thanks
Robbo Tweet