Join some of the tin whistle Facebook groups or other online communities such as The Session or Chiff and Fipple forum.
Follow this blog if you would like more info. Whistles or flutes can be made with a lathe. Chiff & Fipple (referencing the building blocks of the whistle, see our article about the Irish flute and tin whistle here) is the most active forum. There are many resources for tin whistle players out there and many people to exchange your experience with. New Bracker High Whistle Models (C, D, Eb etc) - Chiff and Fipple Forums.
The enthusiasts there can answer any question, but it’s not for the faint of heart - these guys are serious.
CHIFF AND FIPPLE WHISTLE FORUM FREE
I saw this on the Chiff and Fipple Forum, which seems to be the "cafe'" for tin whistle players. So, feel free to check our tin whistle buying guide and choose the best one to suit your needs. Chiff and Fipple is the ultimate tin whistle forum.