I’m not too sure on the nature of the subconscious. I believe it to be a part of consciousness but there are different levels or sections of the entire spectrum of consciousness. Information is filtered so that we can function properly. Think of it this way, if we had conscious control over our bodily functions such as breathing then it would be very hard to function properly because we would have to remain focused on breathing otherwise we would forget to do it and end up dying. I also believe the subconscious holds all the information of the cozmos but at the level we function at we aren’t allowed to tap into this information because once again it would effect how we function.
I have spoken with my subconscious in a lucid dream before. I asked to speak with them and they appeared as a dream character. It was a very attractive woman about same age as me and she knew everything about me, including my thoughts and it was like she was telepathic. When I realised she was telepathic I instantly thought something like “oh shit I hope she doesn’t find out about such and such…” immediately after I thought about a regret I have she said “don’t worry I’m fine with it”. She completely approved of me and loved me very much, we were better than best friends and really hit it off. I also found that I had 100% full control over my lucid abilities and the dream lasted much longer than usual with her around. I really want to see her again sometime