do you know what you want to major in yet? if you haven't decided then it's best to pick a variety of subjects that are required for a lot of majors, e.g. chem, maths, and biology. if you have decided then you can go to that first link and click one of the majors under number 3, there it will say all the subjects you are required to do for your first year (stage 1), and since you do 8 subjects every year, the rest you can fill in with whatever other first year subjects interest you, or subjects commonly required for other majors in case you change your mind down the road. hope that's what you were asking
if you have any questions, I'm currently doing my first year in B science so I should be able to help you out