do u really have to sleep 6-7 hours bfore a WILD?
Hello simone93, welcome to the forum
It is not needed to sleep first but some (including me) find WILD much more easy when you wake during the night because you fall asleep much faster. If you want more info i suggest to read the Big WILD topic in the “the Quest for Lucidity” section.
Hi simone93 ! Welcome to LD4all ! 
As Xetrov is a WILD pro, I fully agree with him… and I’ve nothing to add ! 
I’m guessing that a fair number of people (including me) need to sleep first, the reason for this is that you go into a tsage of sleep called Delta sleep before you enter REM. In delta it is impossible to remian conscious and WILD doesn’t work to well if you are not conscious.
lol Basilus West, im not a pro i think in WILD, i prefer MILD still, I cant do normal WILD only my own tech.
Oh and Lucidity_Master, it’s not impossible to remain lucid in delta sleep, i’ve done it a few times 
It’s easiest if you do it straight after waking up from a dream, and don’t move.