When I was in High School, I was taking a typing class and a guitar class.

A girl I knew was taking both classes, too, only different periods.

We were discussing our difficulties in getting our fingers to do what they were supposed to do with regard to the desired results.

Having had brass band training on the French horn, she said she had a bit of trouble using all her fingers to achieve a sound on the guitar that she had only to blow to get on the horn.

She had also had some piano lessons when very much younger, invariably shared with her older sister.
The mechanical repetition of the lessons was much less like the horn or guitar, but bery much like the typing class.
Piano playing, she said, was like typing in the air...