I'd think two handed shooting the 19 would be okay
I don't think it would. Even though a fully loaded G19 is about 2.5 lbs, arm fatigue from being in a shooting position and the repeated recoil impulses may actually be more damaging than a single 5lb lift.
After having wrist surgery last year my doctor told me not to shoot for at least 30 days. It was the worst prescription I could have received. However the young gifted surgeon knew exactly what he was talking about.
You will have plenty of for shooting after your body heals