First, physical congenital conditions.
Different musical instruments have different demands on the finger. Generally speaking, the hands with better physical coordination, longer fingers and better flexibility are the best.
If the congenital physical condition is good, the learning progress will be fast and the skills will be easy to practice. If conditions are good, ordinary people can practice the skills of 1 000 times, maybe 500 times.
Second, the sense of music.
Including pitch, rhythm and music.
People who feel good about music can easily understand the true meaning of music and handle it well.
In fact, normal people can play musical instruments very well. But if you want to be a performer, you need to have the above conditions.