Good evening,
I agree with what is said above, but there is also a good way to understand how to "arrange" a piece is to listen to how others play it. Take a simple song for example Mon Amant de St Jean, or Sous les Ponts de Paris, listen to it by various musicians (old like Verchuren, to the newest like ..... full of others..... listen to very different versions (very musette, more swingy, or even almost classical) and try to imitate it at first and then little by little you will create your own style; But who says arrangement says also good technique because it often goes with it. Best regards
J-Pierre