A Question On the WILD technique

Well I have decided to try the WILD technique. I kinda think I know how to do it here is how I think.

I find a quiet and dark place and start to relax.
I close my eyes and wait to see the hypnotic imagery stuff.
I don't really know what to do from here so if you could please clear this up it would help. So here is my question.

I closed my eyes to try to see the imagery but i have a hard time keeping my eyes closed like I have an urge to open them. So if anybody has had success with this and could give better instructions please do I would appreciate any help I could get!

P.S. i was wondering if I could do this BEFORE i go to bed. Also when i had my only Lucid Dream it was when i had waken up around 6 but went back to bed at 6:30 and then had one. So if I should do that please tell me i should and what caused!