Log roll technique after spinal surgery. Anyone have experience with this?

My dad just got home from two spinal surgeries. Lower laminectomy and TLIF. He is walking fine and the pain that was radiating to his legs is gone which is wonderful because he couldn't walk without a walker before and only from the bed to the bathroom and back because the pain was so bad.

Naturally the surgical area is super painful right now. No matter how many videos we watch for this simple log roll technique he tenses up and wants me to tell him exactly what to do. And I feel like I'm twisting him which he's not supposed to twist and I'm terrified of damaging the area or opening it up or keeping the fusion from healing correctly. Then when he actually is in the bed it's another 1/2 hour of trying to get his pillows right or adjusting, him which hurts, and he's really not complaining he just wants to be a little comfortable.

We have a visiting nurse coming tomorrow and then pt etc so I know we will get more instruction (my brother showed me, as he was at the hospital while I was home with mom to do her gtube feedings. She had a surgery in September that resulted in 6 weeks at the hospital and rehab and swallow issues with me being there 8 to 12 hours a day--that situation is finally improving ) but right now I haven't slept at my own house in 4 days, and I'm depressed and crying. My brothers have both been wonderful but they work full time.

I can't leave my mother here alone with him at night. She doesn't have the strength to help him up. I know this should be temporary but I'm also going to have to move them in about 3 weeks bc their apt needs to be gutted due to water damage from frozen pipes and have been packing them up for that and still don't know where to that will be appropriate for their health and his recovery.

So I guess the question is how much damage can I do to him with this getting in and out of bed. The rest is just a super crying vent.