AP German Exam Prep Resources

Hello! I’m currently a high school senior about to take German 3. I want to take the AP German test and try for the AP International Diploma (you take a set number of exams, and if you get at least a three in all of them and apply to an international uni, you are awarded a certificate). Because I am only in German 3, and I need at least a 3 on the test to get the APID, I’ll be needing to study intensively outside of school. No test prep company makes an AP German prep book (which makes me really upset, because they have books for all other languages), so I come here looking for good resources that I, an intermediate-level learner, can use to bump up my German knowledge and confidence outside of class. Thank you!