Demolition - Walls but not ceiling
An ossilating tools blade would be trash within a few seconds.
I use a brick chisle to break the bond in the corner then use a 4-1/2" right angle grinder with a diamond blade.
It will go through the old plaster and wire mesh.
Open a window, remove the screen and put in cheap box fan blowing out, have someone close by holding a shop vac to catch the dust. Shut off the HVAC while working.
Wear a dust mask and eye protection.
Seal all doors with plastic, remove anything in the room. (furniture.)
The studs will need to be shimmed to get the new rock to meet the old ceiling evenly.
Strips of 1/2" drywall with just a couple of drywall nails will work most of the time. No need to over nail it, the wall screws will hold it in place.
Once the walls open up it's a good time to address wiring, insulation, air sealing, adding an outlet, fire blocking if it's ballon wall constrution.