One small nit. I am not sure whether this will be relevant.
After my surgery on my left knee, after a few days I was able to drive an automatic car but I was not not able to drive a manual for a few weeks longer. At one point I needed a car for a week and had to rent one because I owned a manual (and yes I was on crutches at the time).
It sounds like your son will not be driving for a bit longer.
Recovery took a while and was gradual, but was very successful.