Just can't get into sleep paralysis and exit the vibrational state.

I just can't get consciously into sleep paralysis. I make it to the vibrational state but that's it.

The thing is I get into sleep paralysis unconsciously sometimes when I have nightmares or try to sleep in the dark. It happened on a daily basis when I was younger. (Like 8 - 16 years old) When that happened I saw shadows watching me and heard evil whispering in my head. Sometimes I even unconsciously rolled out of my body because I was scared and wanted to stand up to switch on the lights and saw my body still sleeping. But I jumped back into my body because I was scared and sometimes the shadows tried to drag me out of the room.

So inducing sleep paralysis like that is not very pleasant.

I just can't do it on purpose. My routine is:

1. I relax and just concentrate on my breathing
2. After 15 to 20 minutes I feel vibrations (But I am not in sleep paralysis and can fully move my physical body)
3. Relax even more, clear my mind
4. I try to climb out of my body but it won't happen. I don't even see anything.

The whole process of this takes like an hour.

So my question: How do I get into sleep paralysis? I even tried it the way I described above with the hope it would happen like always. But It just doesn't work when I consciously try it.

I hope you can help me. Thank you in advance for every answer :)