how do i create an apple account on my sony tv

these are the various devices that support the appletv app and airplay 2 https://www.apple.com/apple-tv-app/devices/

if you just mean how to create an appleID https://support.apple.com/en-us/HT204316

the second blue text link is to a website where you can create an appleid from a computer browser which a dell laptop has

it's called "create an appleID on your computer"