If you're requested to visit disneyplus.com login/begin 8 digit code and DisnePlus.com/Start and you're there, then adhere to these guidelines before you begin.
First of all, the Star Disney Plus app on your phone.
Login now using the account you've created. Disney Plus Account.
After you have logged into your account, look for the 8-digit code on the screen you have just completed. This code is required to allow your device.

https://disneypluscom-begin.com