For WILD, no.
You don’t need HI to WILD. As long as you can achieve sp, or a deeply relaxed state, you can ld. As for what you should do. Maybe you are thinking too much and that’s halting the process. It took me forever to learn just how much I can think without staying too awake, but also at the same time not falling asleep. My guess is you get to where nothing happens, and then because nothing happens, even though you don’t mean to, you think about what to do next.
How do I think?
I think just as if I was dreaming. When I imagine something in my head, I immerse myself, but not by going into extreme detail. I do quite the opposite. I do everything on impulse. I’ll be some where and I’ll want to go elsewhere. I don’t think about the trip there, I just am there. No inbetween. If I want to do something, I don’t think about getting prepared to do it, I just do it.
Hope this helps.