Just about, every night I have been practicing for 3 months, (Practiced for 3 months 2-4 months ago but lost focus after my first WILD attempt)
Meditating, being aware, focusing on sleep spindles, focus
and have recently found Yoga Nidra (Yogic Sleep)
which I've had much success as a great relaxation process that pulls me in nrem 3 in about 20-30 minutes maybe less maybe more depending on the day
Which reduces back to nrem 2 as sleep spindles.
and moves back to nrem 3 in greater intensity with a sense of increased motion,
But I seem to be moving back and forth between these stages of sleep
and just about always when I seem to give up,
I'll check that clock and I've been their 40-50 minutes.
I do this before bed, and sometimes as an afternoon or evening nap.

If I'm doing this before bed, would it be that I need to wait 10-30 more minutes for a dream to form?
Maybe I should be focusing on the HH images in my mind, and help them expand into a dream with my senses?
Or I could just enter the dream , holding focus on my body HH sensations

Few ideas, from researching a bit through the web