How do I share without an apple device?
How do I share appleTV without an apple device?
Question marked as
Setting up Family Sharing requires an Apple device.
Maybe borrow somebody's old iPad or iPhone, or set up a new username on somebody's Mac, and log it into your Apple ID?
Set up Family Sharing - Apple Support
It's also apparently possible to set up Family Sharing with an Apple Music Family subscription on Android via Apple Music: Use Family Sharing with Apple Music on Android - Apple Support