advice please

At my school only juniors and seniors can take AP classes and i am a junior and signed up for AP Government which is a semester class so it moves very quickly.I had my first day of school and I have a quiz tomorrow on 30 pages of textbook stuff which is more confusing and hard to understand than Shakespeare.This is the only AP class I signed up for and I feel like if i stay in it I will get a D,a C if I am lucky.I feel like if i switch out then I wont get into college because I didn’t take any AP classes.Idk what to do but I am already stressed out because my normal level classes seem impossible too!I’m concerned that if i bomb the test and switch to normal gov. that the grade will stay with me but if that happens I will try to talk to my guidance counselor.Any advice?

Which colleges are you looking to apply to?

I know it isn’t very realistic but I am aiming for competitive colleges such as Babson,Brandeis,etc.