Unfortunately, this is not so easy, because the Teleboy app is an app that can be downloaded for Android devices from the Google Play Store. However, Amazon Fire players do not have a Google Play Store, at least not without tinkering with the devices and installing additional tools. The best experience with Teleboy would be with these devices (from cheap to expensive):

Google Chromecast with Google TV 4K (Google Assistant)

nVidia Shield TV (2019) (Google Assistant)

Apple TV 128GB (3rd Gen) (Apple Siri)

nVidia Shield TV Pro (Google Assistant)

These devices are all excellent for watching Teleboy, although the Nvidia Shield TV Pro, as the most expensive solution, of course has a few extra features, such as. e.g. an even better AI Scaler Mode than the normal Nvidia Shield (and also Plex Server functions).