I can consistently hit SP now, I usually do at least once every morning I try to.

I usually will get the vibrations and the spiked heart rate (though I don't usually get any hallucinations of any sort). Unfortunately, regardless of what I try to imagine, I'm not actually getting to dream state. It's like I just sit there with vibrations for 15 minutes, and then give up and deep-breathe-exit SP.

One time I think I did get to dream state, (or at least the vibrations stopped and I kind of "shot forwards" into this black spot in my head). I was fully lucid, but I couldn't do anything. I'm not sure if it was a dream or not. I tried to make some surroundings, but it was like I didn't even have a body. Everything was just blackness, and after a few minutes I just woke myself up because I wasn't getting anywhere.

So what am I missing here? Doesn't dream state naturally follow SP?