I'm curious as to how long before bed I should turn off electronics and TV. I heard they affect LD results. When is the best time for attempting a WILD and WBTB?

I had a strange WILD attempt last night. The hallucination was that I felt as though I was sleeping on the other end of the bed than where I was originally and the noise from my fan helped to enhance it to the point where I heard my fan as if it was placed differently in the room.

What can I do to clear my mind to LD? To make things worse, I just got out of rotator cuff and labrum surgery. Is there anything I can do to become comfortable? My shoulder is in a sling until Sunday and it's uncomfortable to try and WILD.