How hard is it to teach myself Bio?

How hard do you think it would be to teach yourself high school bio on your own for a test out? Im a petty fast learner im a year ahead in honors math and I have an AP class in 9th grade. Is bio a class where i can learn and store all the information along with all my other classes in 6 months? I was supposed to be in honors bio but I transferred schools. They kept me in my accelerated math and social studies track but they do not offer accelerated English in 9th grade and they put me in geophysical science (A class i already took). Even though its frustrating that im doing geophyis again this year but id like to get back into my original track by testing out of bio. I cant afford a tutor so khan academy is my only help. How hard would it be to teach myself?

sorry about spelling stuff i was rushing

this is the course http://www.pccsk12.com/home/showdocument?id=1473

Talk to your guidance counselor. You shouldn’t be in a class you already took, and it’s important to complete bio. You may need to bring your parents in to help advocate for you.