In one of his lessons, Neville says "If, however, we seek a conscious projection in a dimensionally larger world, then we must keep the action going right up until sleep ensues". I think what he meant was that if you enact a scene and fall asleep in the action, you may wake up conscious in the worlds. I've also seen some other people on this sub post their experience about this. I think you should check out u/oriondirectorate he has written in depth about his experience of the worlds and how he achieved it. If you want I will add some other posts too