Not difficult. They are all keyboard instruments. The keys of an electronic piano are softer than those of a piano. But your feet should be flexible, your hands should react quickly, you should be ready to change your timbre at any time, and your body should be well coordinated. No foundation of music theory is needed. When do you need a musical theory foundation to play the piano? Unless you want to write your own music to play (there are not many scores for double-row keys). Nothing is based on electronic organ. Just press a few times to understand. But this major is marginal and the piano is very expensive. The piano bought here in Chinese mainland is not the best, and it is difficult to carry. The keyboard you step on is easy to break down and it is very troublesome to maintain. No one is the best teacher in China now, but everyone is groping. Look at the woman with double keys in "Miracle in September". Her level is good among the few double-row keys in China. This major has the best development in Japan, but it has not been popularized internationally, so the future is bright and the road is tortuous.