When all is lost, when all is let go of, when all is abandoned what you are left with is an ocean of bliss. What you emerged with what you are is an ocean of bliss. Your cells and atoms and brain and bones and blood stream all of it is bliss.
The Buddhists think that, because we've all had infinite previous lives, we've all been each other's relatives. Therefore all of you, in the Buddhist view, in some previous life ... have been my mother - for which I do apologize for the trouble I caused you.
You could then use the dream to learn more about yourself, others, the world, and the nature of life. You can come awake in the matrix and realize you're the one in your own dream. People on the spiritual path can do that, thus they can avoid wasting the whole night, and use it in a developmental, nice way.
The idea that somehow "no self, no problem"- I don't exist because I don't have a self- would be a mistaken understanding. However, the selflessness teaching is not that hard to understand. What it means is a type of self that people feel they have, like a fixed, unchanging identity. Either they know they have it, or for some, they feel they need to seek it, and possibly have an experience where they feel like they found something. That type of fixed, unchanging, essential self, or absolute self doesn't exist. That's what "no self" means.