Unable to access my apple tv

What happens when you try? Error message(s)? More information would help. Have you tried restart and resetting the Apple TV to see if that allows you to log in?

Apple TV - Restart.     

Apple TV - Reset.   

Is it the latest generation? If yes, I found everything about setting it up being something of a pain. Unfortunately, I don't have too many personal recollections. I think having patience is a personal necessity. Any way,

See Set up Apple TV https://support.apple.com/guide/tv/set-up-apple-tv-atvb73e46488/tvos and

How to set up an Apple TV and Apple TV 4K https://www.digitaltrends.com/home-theater/how-to-set-up-apple-tv/