Hi,
I created a series intended to guide a complete beginner through the steps that lead to the creation of a PMS Ubuntu server appliance.
It also covers loading media, accessing media on Windows platforms and maintenance tasks.
Hope it helps.
Video https://www.youtube.com/playlist?list=PLt_MXOexTCYWfOBJeufs6z60y7KOS5bgS
Supporting documentation https://www.alanbonnici.com/2020/06/howto-setup-pms-appliance-on-ubuntu.html