Get the Disney+ App installed and working on your android device. If you are not able to download the Disney Plus App from the Google Play Store then you will find this tutorial useful. I was able to successfully install Disney+ app on my Xiaomi Mi 8 phone and I have mentioned in this tutorial what steps I had to follow.

The Disney Plus App is free to download however Disney charges you a fee on a monthly basis to use the service. This fee will be dependent on the region you are resident of.

You should be able to get the app installed on most android devices (phones, box) using this tutorial.
If you have any issues then let me know through comments!