Nirvana is not a place but a state of existence/being. I suspect it’s a state of being where one is conscious of the unconscious and thus awakened to the All. Being awakened/conscious to what you are unconscious off is of course a paradox but as the Buddha taught anything we might say or imagine about nirvana will be wrong. “Nirvana is beyond space, time, and definition, and so language is by definition inadequate to discuss it. It can only be experienced.”
I suspect that such an experience liberates a person from the suffering of the problem of opposites and cycle of birth, death and rebirth of karmic tendencies. In the present that would be freedom from repeating patterns that keep us stuck and stuck dissatisfied with life.
We work for that which no work is required – we get in our own way. I suspect that the experience expands perspective of not just a knowing but living life as it is and discovering we can say Yes to it as it is. Yes to all of life as it is and know that it is LOVE! All of it, the good the bad and the ugly (there is no good, bad or ugly). Wrap you being around that possibility of Yes and know it as Love and you start to sense everything how everything is connected. In such a state, there is no place for stress or dissatisfaction.