Castro graduated in 2017 from the University of Maryland, where she earned her bachelor’s degree in sociology with a focus on institutions and organizations. At the University of Maryland, she participated in the Global Public Health Scholars Program and was active in Students Helping Honduras, a humanitarian service project seeking to eradicate extreme poverty and violence through education and youth empowerment by building schools in Honduras. During the summer prior to her senior year, Castro interned at Catholic Charities of the Archdiocese of Washington. There, she assisted the Legal Orientation Program for Custodians of Unaccompanied Minors program.