Ceiling installation

Hi everyone,

I have Volumio installed 2 rooms currently and hoping to install in more. I life in an old house and was wondering if anyone had any recommendations to what equipment to use. I would ideally like to install ceiling speakers and maybe amp in the wall connected to a volume switch.
So my questions are does anyone have any tips about installing ceiling speakers without tearing down the ceiling?
And what amplifier and switches would people recommend?

Thank you very much everyone any help is truly appreciated.