Completing his studies at the National College of Buenos Aires, Nicolás obtained his teacher's[2] degree, which allowed him to accept a job in the public education system, first taking teacher posts in rural schools, which allowed him to know the interior of the Country and live for some years in Chubut teaching in Welsh schools. After this work experience, he would return to study at the University of Buenos Aires, where he received his Bachelor of Arts in Philosophy and Letters. At this point in his life he began his essayist activity, writing texts under pseudonyms or for other writers known as ghostwriter, a task that led him to enter circles of porteño intellectuals of the time by the hand of his cousin Adolfo Bioy Casares who invited him to participate in Sur magazine, a literary magazine of Victoria Ocampo through who would meet his future wife, fashion journalist "Péle" Pelegrina Pastorino.