If you plan to work in international development there are some basics you need to know about development. A great place to start is by having a look at the Sustainable Development Goals (SDGs).

Wikipedia provides the following description of the SDGs.
The Sustainable Development Goals (SDGs) or Global Goals are a collection of 17 interlinked global goals designed to be a “blueprint to achieve a better and more sustainable future for all”. The SDGs were set up in 2015 by the United Nations General Assembly (UN-GA) and are intended to be achieved by the year 2030. They are included in an UN-GA Resolution called the 2030 Agenda or what is colloquially known as Agenda 2030. The SDGs were developed in the Post-2015 Development Agenda as the future global development framework to succeed the Millenium Development Goals which ended in 2015.
The 17 SDGs are: (1) No Poverty, (2) Zero Hunger, (3) Good Health and Well-being, (4) Quality Education, (5) Gender Equality, (6) Clean Water and Sanitation, (7) Affordable and Clean Energy, (8) Decent Work and Economic Growth, (9) Industry, Innovation and Infrastructure, (10) Reduced Inequality, (11) Sustainable Cities and Communities, (12) Responsible Consumption and Production, (13) Climate Action, (14) Life Below Water, (15) Life On Land, (16) Peace, Justice, and Strong Institutions, (17) Partnerships for the Goals.
Check the link below for more information on the SDGs. The website provides a primer on sustainable development goals and is worth visiting. Simply click on any goal on your screen and read more information about your selection.
https://www.un.org/sustainabledevelopment/sustainable-development-goals/