Quick note about turning your camera on and off.
Don’t, not all the itme. Just let it time out and go to sleep.. It uses almost no power that way. And you don’t wear out the switch. Touch the shutter briefly to eke up th camera when you need it.
But note: the camera will briefly turn on when you hit the shutter and some other switches.
And – and this took me time to figure out – when you move many lenses. The lens, when jarred, can talk to the camera, which will wake up!
Finally: it’s good practice to turn off and on when switching lenses. If only because the dust shaker will operate just when dust is likely to get in.