I was able to sleep on my side at week 3-4, but just for a short time each night. I was able to cross my left leg over the top of my RTKR, so I was sleeping g on my right side. Some people are able to sleep on their side by placing a pillow between their legs.
I used a cane at week 2-3 because my bathroom was too small for the walker. I did use my walker as a means of getting in and out of my super high bed. The day I came home from rehab we realized I wasn't going to be able to climb into my bed. So my family got busy building a step, we placed the walker around the step so I could use the handles to step up. I walked much more naturally with a cane than with a walker. My posture was better, by gait longer and I had a free hand.