[Feybio]

Hello everyone,
I was thinking of buying this minix u9 to pair with an LG Oled TV but I would like to understand what I can do with the android part and what I can do with the LibreElec part.
If I understand correctly with the LibreElec part I can see my ultrahd movie collection converted into MKV 4K HDR without problems, right?
While with the Android part can I do all that is feasible with Android TV or is it a custom system?
It is possible to have a link to a step by step guide on the installation and configuration of LibreElec ... the easiest possible thanks.

Thanks again for the help.