To activate Disney Plus on your Firestick, follow these simple steps. First, power on your Firestick and navigate to the home screen. Search for the Disney Plus app and install it. Once installed, open the app and sign in with your Disney Plus credentials. An activation code will appear on your screen. Visit disneyplus.com/begin on a separate device and enter the code. Follow the prompts to complete the activation process. Once activated, you can start streaming your favorite Disney content directly on your Firestick. Enjoy seamless entertainment with Disney Plus!