Is there a MASTER VIDEO tutorial (or set of them) that walks through how one can/ should play with panels to find their IDEAL Music Bee ARRANGEMENT ? and SKIN Combo?
I'm not aware of a video, but this page covers most of the panels (a few have been added since it was updated last): https://musicbee.fandom.com/wiki/The_Anatomy_of_MusicBee
As for skins, go to the skins
and try ones you like. They don't change MusicBee's functionality, just the appearance.