Nasty, I had the same fracture, it was the closest I’ve come to puking with pain when they tried to straighten the arm out to x-ray it.
I think it was about 2 months before I was riding again, I forget the exact details because it was a few years ago now.
As others have said, be religious with your physio. I think it probably took several months to a year to regain the movement /mobility I have now.
Still get the very occasional twinge, and ‘crack’ now and again, but other than that it’s pretty much back to normal.
i never completely got my nerve back on the bike though – a lot more hesitant on downhills/tricky stuff than I was, although that might also be due to old age.