Using the Apple Music client

sure but it just does a small part of OP's requirements and you probably want some continuous monitoring to go along with that and a nice dashboard.

If you want to deploy Linux in an enterprise scenario properly, the only real option is using RHEL. Red Hat has a product called Satellite which allows for centralized managing of RHEL installs. This includes patch management, security policy monitoring and provisioning. You can also use something like Red Hat IdM to do user management like in AD. It is also basically your only choice if you have to comply with something like HIPAA. For AV you can use something like Sophos if you absolutely need it https://support.sophos.com/support/s/article/KB-000038296?language=en_US .

"Open in terminal" is a functionality provided by a plugin for Gnome Files that is installed with a package manager. As far as I am aware, there is one alternative plugin that provides "Open in Tilix". This means it is not easily user configurable.