how do I get to settings for my apple tv?
I need to update information on my credit card I'm using to pay my Apple TV
FireTVStick(Gen2),
On any computer, using a web browser log in to https://tv.apple.com with the Apple ID used on your Apple TV.
Select the user icon at the top right of the screen, then click on Settings.
Click on Manage Payments, then click on the payment method you want to update or on Add Payment method if you need to add another one.