Self study AP macro and micro economics?

<p>So I'm a sophomore and I was wondering if it was smart/doable to study for these 2 tests without taking a class. My high school doesn't offer either of these classes as AP courses but economics as of right now is what I think i'll major in (I know it might change but it's what I think I will do). Will it help my application if I do this? Should I only self study for 1 and not both? How hard is it to self study these tests without taking the class?</p>