Last night, I tried to attempt at a WILD, and here's how it went down.

I laid down, and did not move at all. I tried to keep my mind awake, but after awhile I got really tired and I kinda felt this wave of energy like everyone describes it, but I'm not sure at all what it was. My arms were sort of numb. A little bit after I felt that my mind got really tired and I just decided to just fall asleep. My mind was too tired and groggy to tell myself to lucid, or to make sure I will know I'll be dreaming.
By the time I think I enter sleep paralysis I'm really tired.
Any tips?
How do you WILD?