Economics is a social science subject. It is essay based but you have to draw graphs, use analytical skills and do simple maths (like in physics, chemistry and biology). You will learn about taxes, how governments run countries, what policies governments take to improve the welfare of the nation, how governments fund their projects, demand, supply, the impact of government's decisions on producers and consumers/customers etc.
I can explain more but I would have to use terms from economics that you don't know. Let me know if you have any questions!