Hello,
Economics is basically a social science on how different factors affect the spending patterns of people.
If you've done Economics for your IGCSEs/GCSEs it should help because the first few chapters are the same, with just some additional information and retaining the concepts you've learnt before will definitely help. Economics is one of the few subjects that requires outside reading and real-life application, so keeping up with global economic trends is a definite bonus. Lots and lots of reading will be very helpful!
Good luck!