I love AS Economics (not sure about A2, quite vague at the moment for me but I will concentrate on it again once the school year begins). It is an essay-based subject, not entirely but you will have to write quite a lot, even in MCQ part (Edexcel exam board's experience, I don't think other exam boards require this). If you concentrate on it and can grasp the knowledge, it will not be hard, just all about the right exam techniques. Try to make some mindmaps and write concisely about the topics you have finished early, read it over everyday so it would give you a firm foundation for further topics that you have to do (they are connected with each other closely). I would suggest going to Tutor2u to read for explanation, or do further research on Internet about parts you don't understand, and go to Youtube to watch videos (Khan Academy is a good one for me). Good luck!