I had a serious motorcycle accident about 6 years ago. Broke my clavicle in two places, broke my scapula, and 3 ribs. I was off work for over 3 months but part of that was that I had to wait for skin injuries to heal before they could do surgery on my clavicle, and then that was postponed for several more weeks due to the surgeon having an emergency call. After surgery it was a while before they started me on physical therapy and by that time, I could barely move my arm because it had atrophied so badly. It was a few weeks of PT before I could drive.
I'm sure it would have been a lot faster without the delays but still a long time. All I could say for advice is do all the PT they tell you to do and more. That will minimize the recovery time. Good luck with the healing.