Learning g to drive a manual is an accomplishment she can be proud of. But how good are her knees?
My girlfriend and her two sisters supposedly can drive sticks. My girlfriend has done it on a VERY limited basis, a long time ago, has one knee replacement, and one bad one, younger sister can drive any stick, if her left knee is good enough (knee replacement) and the youngest sister learned to drive a stick in her 65 426 street wedge four speed, about forty years ago.... and I don't think has driven a stick since.