Set Edge as Default Browser per User

[shocko]

I have two questions:

1. How can make Edge the default browser for a user? I see there is a GPO to set the file type associations as per here but this is per computer. Also, Edge has a button in edge://settings to make it default. is there an API call, CLI tool, registry or the like to do this per user? Maybe even start Edge with a flag to make it default?
2. I wish to simulate the experience users will have when IE11 is retired. Is this GPO the way to do this Disable Internet Explorer 11 | Microsoft Docs ?