I also woke myself up constantly snoring while trying to sleep on my back. I don’t think I slept much at all during the first two weeks. But by 12 days postop, I was able to get about two hours on each side befor needing to switch sides.
I just started very gradually with just a few minutes, trying several times a day and night, slowly increasing this until I actually slept two whole hours on my side.
Now at 3 months, sleeping on my sides is completely normal although I still like the pillow between my knees, which I did before surgery, too.
My incisions are high up on the front of both thighs, are only 3 inches long, and I have never even felt them so I didn’t have to deal with lying on a painful incision.