Simplify the following text for a Grade 13 native English-speaking person.
Original: In addition to learning to play established or ancient pieces very well , highly skilled qin players may also compose or improvise , although the player must be very good and extremely familiar with the instrument to do this successfully .
Simplified: In addition to learning to play established or ancient pieces very well , highly skilled qin players may also compose or improvise , although the player must be very good and extremely familiar with the instrument to be successful at it .