yeah, the interface is confusing. some things I figured out just by accident. you can mute the system by holding down both volume buttons. holding the home button brings up a quick action screen to adjust brightness and other stuff without opening up the settings app.
the way the content manager works makes sony look crazy paranoid. everything is done on the vita itself. the PC app isn't a manager like media go for psp was, it's more like a driver that allows the vita to a folder on your computer for specific stuff. you can't drag and drop and use it like an external drive.
like you said, the hardware is incredible. and this is early firmware and can be improved. the original PS3 and 360 were bad too (and PSP, 3DS, Wii, iPhone, etc.)