Generally speaking, Dong Xiao is a musical instrument with less skills. You don't need tongue skills, and you rarely have fancy fingers. You are still easy to learn. You have an advantage when you have a large lung capacity at first.

If you watch music playing, you can start playing music immediately after learning to play sounds, if you have a foundation of notation before, but your proficiency needs to be practiced. If there is no symbolic basis ... then I'm not sure. This kind of thing varies from person to person. Any kind of musical instrument is, even if you learn to read music and play, it takes a long time to practice to really play skillfully, and nothing can be done overnight.