Ok, I understand it now
So, if you are successful with void meditation you can easily get into the state of between sleep and being awake?
I don't really know how to describe it but when I wake up sometimes I'm in that state. I don't realize that I'm awake but I'm not asleep either. Only after about 10 minutes I finally realize that I woke up and I can't remember what happened during this state (it's like there is a "void" in my mind and I didn't think anything). That's also how I got into sp my first time (I was in that "void" and when I became conscious again I was in sp and wilded for the first time )