And so we learn to surf, the edges of the conscious and the unconscious brain. So we learn how to stay there for longer and longer periods of time.
At first, it may be no longer than a few seconds.
Eventually, you can maybe learn to stay in it for hours but awake at the same time, madly pounding away at the keyboard downloading the unconscious brain. But that is not going to be for a very, very long time, if ever. Be happy with seconds because an insight comes in a single brilliant flash, in a single moment, and you need no more than that.