Hello Toby dole,
Welcome to Microsoft Community.
I want to start by explaining that Apple ids are accounts that only work with Apple devices and cannot be used with other non-Apple services.
So if you want to pick up "Among us" from the Microsoft Store and play, all you really need to do is sign up for a Microsoft account.
Typically, Apple ID will require you to register with an email address that can also be used to register for a Microsoft account. A simple video tutorial is below:
How to create a new Microsoft account
Once you have a Microsoft account, log in with your account in the Microsoft Store, get "Among US", install it, and have fun.
Best regards,
Mitchell - | Microsoft community support expert from MSFT