I fractured the ball joint at the top of my humerus around five years ago and can relate to this.
https://www.disjointedreality.com/journal/2017/4/29/an-unexpected-break It echoes my experiences to some extent. My accident happened on 31st August 2012 on the last Friday of the school holidays. I was a teacher at the time and was 'looking forward' to returning to work on the following Monday. Well that never happened. By 16th September I had managed to lever myself back onto the turbo. I did it by standing over the top tube and clipping each foot in in turn and pulling and pushing myself on to the saddle. I rode 4 times that week all logged on Strava as one armed post crash rides. These continued for around month until I was finally riding with both hands on the bars. I did it initially by padding the right bar out with a towel which in fairly short order became less and less necessary. I began to drive also, sitting close to the steering wheel like a Nascar driver, enough to get me into work only to be told I needed to see an occupational health adviser before returning. Simple fact was. I had very little mobility in my right arm and wasn't allowed to return to work on H&S grounds; stairs, crowded corridors, children, bags etc were all cited . I eventually returned on 3rd December following a second OH assessment on a phased return. The garage and I become well acquainted through the winter months and it wasn't until 17th Feb that I ventured back out on the road. Different injury I know but a similar experience in so many ways