FrankXin Answer to the question: My personal suggestion is to start with listening and copying. If listening and copying works, then playing by hand should be easy; after a little practice, automatic playing will also become natural. However, if listening and copying doesn't work, it's difficult to master the rhythm, and playing by hand can easily lead to mistakes. Automatic playing is also prone to missing or adding notes.
Suggested approach: It's best to start with the hand keys. First, master the hand keys and their rhythm. Once you have a good understanding of the hand keys, automatic keys will be much easier to learn. Alternatively, if you prefer to start with automatic keys, you'll need to learn the hand key techniques separately.