Google "how to install home assistant" which leads to:
>https://www.home-assistant.io/installation/
>If you are unsure of what to choose, follow the Raspberry Pi guide to install Home Assistant Operating System.
This leads to:
>https://www.home-assistant.io/installation/raspberrypi
This has a nice visual guide that requires you to know how to buy a raspberry pi, how to plug in a raspberry p, how to plug in an sd card (twice), and how to navigate to a url.
What about upkeep? Sure, installing PopOS is pretty easy if you follow the tutorial, but what happens if you try to install Steam one day and it breaks your desktop environment? Or maybe your sd card accumulates too much writes and corrupts your OS, and you have to diagnose the root cause?
It performs a backup whenever you perform a release, so if the SD card gets corrupted.. just follow the install instructions a second time and upload the last backup?
That's it for the upkeep, other than dealing with 3rd party APIs that change and make things break, but that's not HomeAssistant's fault.