Personally, I relate some of what you describe to "hypnagogia — the state of cognizant pre-sleep or drowsy relaxation.... Hypnagogia naturally occurs twice daily: just prior to and following sleep. It is a period of hallucinatory sentience during which you are nonetheless capable of controlling attention. What’s more, your rational defenses are lowered. This may be considered “prime time” to visualize a desired end. (Hypnagogia is also a period of heightened extrasensory-perception (ESP) activity, as recorded in academic psychical research.)" That's a quote from Mitch Horowitz's https://mitch-horowitz-nyc.medium.com/you-are-what-you-think-you-are-a5f41e6622a0

As I wake and go back to sleep several times a night (I know, far from ideal for restorative sleep), I can experience this several times a day. For me, I find that in this state I am receptive to ideas and creative thoughts, which may be Greg's, or may be Marcus's (my soul), or may be influences from spirit guides or souls of dearly departed friends and family.

I often get similar results from just the right amount of alcohol, what that amount is would be different for every person. You may not approve of that but it is fact for me. My psychic and I both find that we have increased connectivity to other realms when we are under the influence. I write some of my best poems in that state, which may be just that it frees up my creativity or it could be that I am in better contact with the other realms and more susceptible to the influence of my muses. This poem was a total download in that state. https://medium.com/write-under-the-moon/manifesto-1a8e00acb5a4 This one, my prayer for my friend's daughter who was on life support with an acquired brain injury, https://medium.com/@marcus17043/i-am-sitting-by-her-bedside-right-now-begging-her-not-to-leave-me-keep-me-and-my-baby-girl-in-c0d12661d5a3 , I know was aided by my seeking suggestions in that state. The first stanza of seven reflected that request and the second the answer:

"Dear Team

Rama and my guides

Dearly departed Sitara, Andrew, Jason, Willie

I open my portal with gratitude for guidance

Thank you for sharing feelings of love and light

Feel

Eternal love of parent for child

Energy of the sun

Life"

At times after fully waking from the natural hypnogic state I will immeditely open my computer to write a poem (https://medium.com/technical-excellence/what-do-i-do-when-i-find-myself-stymied-by-a-writing-prompt-edb23cec6672 and https://medium.com/illumination-curated/oh-so-alone-on-an-island-in-a-sea-of-humanity-191b0674026a or an entire essay I had written in my mind or finish one that I had left unfinished waiting for the split screens of my sub/unconscious to complete it. That happens so often it's hard for me to isolate specific instances but I am pretty sure these two essays came about in that fashion: https://marcus17043.medium.com/are-you-living-or-merely-existing-614f982432a5 and https://marcus17043.medium.com/the-artist-the-alchemist-and-the-pioneer-at-work-in-my-garden-59b5c4a77e63

Now I'll tie this all together. I stated to my psychic that alcohol doesn't make us more psychic but probably simply impairs the parts of our brain, probably the rational parts, that work against everyone's innate psychic powers. In the hypnogogic state, the same process occurs by natural means. The same is probably why hypnosis works.