You have the choice of whether or not to register with Google and use the play store. My wife and 5 year old require simplicity, so I registered.
Android TV is a little different than Android on a phone. Not every Android app is compatible, but most are. It’s just like a chromecast.
So any play store app like Hulu, Netflix, Disney+ etc will work just fine, as will plex / jellyfin.
My home couldn’t possibly be improved any further!