system
A chat on 4chan
human
Wild is just waking up after 4-6 hrs and setting the intention somehow right? 
I don't force myself to sleep on back, I'll meditate for a while on back position and once that state right before sleep happens I'll rollover and snooze. 
It's poggers technique, don't try too hard, LD is easy and everyone can do it!
gpt
if the relaxation step is problematic try doing deild, its a wild variation that skips the relaxation but has to be done right after a dream has ended

wbtb is waking up after 4-6h to skip the deep sleep, wild is going directly into ld
your sleep position doesnt matter, but sleeping in an unfamiliar position/place makes you more aware so thats why sleeping on the back is recommended so much