|Missing a limb is not a reason to not train.|
I spent 9 months training with no ACL in my left leg. In that time I learned a lot about not using my leg and/or using it barely to do many things.
One of the moves I found recently that I can do despite the relative care with which I have to roll regarding my post-op ACL leg is the following sweep. Even without a strong (in the case below) left DLR hook, I still hit this sweep pretty regularly when rolling.