To activate Disney+ and begin the login process with an 8-digit code, follow these steps:

1. Subscription Setup: First, make sure you have subscribed to Disney+. If you haven't, visit the official Disney+ website (disneyplus.com/begin) and sign up for an account.

2. Access the Activation Page: Once you have subscribed, go to the official Disney+ activation page. You can find this link on the Disney+ website or in the instructions provided when you signed up.

3. Login or Create an Account: On the activation page, you'll be prompted to either log in to your existing Disney+ account or create a new one if you haven't already.

4. Enter the 8-Digit Code: After logging in or creating an account, you will be asked to enter the 8-digit activation code. This code is usually provided to you when you sign up for Disney+ and is used to link your device to your account.

5. Device Activation: Once you enter the activation code, your device will be linked to your Disney+ account. This means you can start streaming content on that device.

6. Enjoy Disney+: After successfully activating your device, you can start browsing and enjoying the content available on Disney+.

Please note that the steps might vary slightly depending on updates or changes made to the Disney+ platform.

If you encounter any issues during the activation process, it's a good idea to visit the official Disney+ support page for further assistance or contact their customer support for guidance.