To obtain a secondary education, she began at the all-boys' school, Instituto de Varones de Masaya and concluded her studies at Instituto Nacional Central Ramírez Goyena in Managua.
[2] Though attempts were made to dissuade her from studying law, Núñez enrolled at the Central University of Nicaragua.
[2] That year, she won the national literature prize Premio Nacional de Literatura Rubén Darío for her unpublished novel Renunciation.
[7] Núñez was the first woman deputy to serve in the National Assembly of Nicaragua.
In one case, she was able to resolve a long-running dispute between two towns in the Estelí Department, by helping La Trinidad obtain its designation as a city in 1962.