My experience with my sister was much like what markymark noted - we used Ring cameras, Hospice was essential, I was trained on administering morphine.

There is some danger in new situations so protect yourself. My sister eventually could not walk, so I bear hugged her up and out of wheel chairs. The point came when she could no longer lock her legs - and she collapsed - instantly - as I was lowering her into the chair - worst possible moment. We both went down. My hand was around her head so she did not hit her head on the tiled floor, but my head hit the granite countertop in the bathroom. Our son drove over - my wife, he and I drug her with a sheet back to the hospital bed in her bedroom and got her into bed. The impact opened my forehead to bone, so to ER for 14 stitches, CT scans, etc.