Nirvana is a a state, a state of deep consciousness. It is that relaxed state that all of you wish to achieve consciously or unconsciously. To get to to Nirvana needs some tough steps. Tough in terms of strength. How strong you are is what will decide as to when will you reach the Nirvana.
By strength, I do not mean just physical but your mental strength. Follow your breath for there is unresolved history unlocked in your breathing. As you become aware of your breath, you have an access to your history- who you are & why are you here?
I did many experiments in order to achieve Nirvana & so will you do the same. But your experiences will be your own, a result of your own self-introspection.
Love & peace