The new and better ‘WordPress on App Service’

There doesn't seem to be an option to deploy to an existing App Service plan (with any of the WordPress Web App options). I have an existing Standard S1 plan (I believe, very difficult to determine which plan you are currently on), but it would not let me use this plan. I don't currently have a DB server (can't figure out if I should use Azure Database for MySQL or Azure Database for MariaDB, MariaDB is the better choice and 100% open source but it seems to be more expensive), and plan to use the MySQL In App for testing purposes before deploying a DB server..
Is there a tutorial to manually deploy a WordPress app since I can't seem to use any of the pre-built options?

Even if performance will suffer, we should be able to use any combination of App Service plan and database option (including in app DB).

I am not a developer, I'm a hardware tech that does IT service and support (I avoid the CLI as I like my GUIs/WebUIs, and I don't code/script), my brother is very proficient in PHP and WordPress (he even writes his own custom WP plugins), but we're having a very difficult time figuring out how to deploy my client's site to their existing Windows App Service plan. Is there a tutorial/quickstart guide for manual WP deployment that I missed?

On a side note, I know Azure is geared more to developers, but more tools for admin types in the portal and guides focusing on using the portal instead of one of the myriad of CLI environments (CMD, PS, Azure-CLI, Bash, etc.) would be nice. Just because I can use a CLI, doesn't mean I want to, especially if the command I need to run is the equivalent of ticking a checkbox and clicking save or simply changing the numeric value of a setting. One can only remember so many things, I've forgotten more CMD stuff than I remember.