What is the best way to learn to play the tin whistle using a d tin whistle finger chart?

The best way to learn to play the tin whistle using a d tin whistle finger chart is to practice regularly, start with simple tunes, and gradually progress to more complex songs. Familiarize yourself with the finger chart and practice the finger placements until they become natural. Additionally, watching tutorial videos and seeking guidance from experienced players can also be helpful in improving your skills.