Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Howard Baysah.
Welcome to the Microsoft Community.
I understand that you want to install Microsoft 365 apps on your tablet.
It should be explained to you that Office products are currently divided into perpetual license products and Microsoft 365 subscriptions. The Office Home & Student 2021 you have falls into the former category; after you purchase this product, you can use it on one device but will not receive subsequent feature updates, and it is not supported on mobile devices.
Currently, Office is free for mobile devices up to 10.1 inches in size, but if your device is larger than that, then you will need a Microsoft 365 subscription to use Office products on it.
I hope my explanation has answered your questions and thank you for your understanding and support.
Best Regards
Eliac | Microsoft Community Support Specialist