If you want to activate your device for a Disney Plus subscription, you'll need to perform a sign-up operation first. Follow the steps below to sign-up for your account:

First, make sure you have an active internet connection.

Open your web browser and type the web address, disneyplus.com login/begin. You can also choose disneyplus.com/begin.

Now a page will open in front of you. Locate and navigate to Sign-up.

Now click on Sign-up button.

A form will open which you have to fill. Enter name, password and email address. Click on the Next button.

Now enter your payment information, including card details and the plan you wish to subscribe for.

Click on the 'Finish' button.