Didn't you research the specification or the syllabus before you chose the subject? Anyway, psychology involves a lot of core studies in year 12 and research methods. That's pretty much all it is (I did OCR). In year 13 you focus more on applied psychology, so in my school we did mental health, child and criminal psychology. You do look at core studies, just not in as much detail but you look at a lot more of them. You study the background of the areas and how they are applied to everyday life. Then it is a lot of exam practice, recap of the studies learnt in year 12 as well as research methods. Yes, it is a bit tricky. I found it difficult to memorise all the studies and distinguish between research methods like types of validity. Also, time management for the applied psychology paper was hard but if you put in enough effort you'll be fine. I got an A* in the end.