My husband is only 4 weeks out with bilateral. He is already frustrated. Right arm has little function. Left is more useful except that he had some numbness in his fingers before surgery and it is worse now but of course he is right handed. Neither can go to the top of his head or get behind him. He doesn't have any one arm that is close to normal. He can't dress independently or get out of bed. His scores ranged from 0 to three.
Waiting around is going to be hard.
His surgeon did talk about nerve transfers. There was no timeline yet.

We are getting a little home health care, but mostly they have not given us much we can do to make things easier. The exercises will be helpful eventually. I have to help him even lift his arms for some of them.

I have read a little about the stimulator. Reading about putting in the effort has halped as well.

I think you should recover faster. Shoulders should be soon.
My husband can do nothing with biceps. Lost all strength. That seems to come later.