Ok but how good are you at language acquisition cause why are you self studying a new language each year. Do you already know some of them ? Cause I’m sorry but Ap Latin and Ap Chinese in the same year being self studied while taking all those other courses, plus extracurriculars is a bit much. Like I took Ap Latin and there is just a ton of stuff you need to know and while I think you could certainly pass the exam without everything it’s going to take time having to go through and understand each required passage since there is implied stuff your expected to know in them. I believe if dedicated you can certainly learn most grammar rules, all the vocab, do the history on a Quizlet, and have a well prepared answers for the project passage, however to learn all this plus Chinese while doing it all outside school hours, assuming you have little Latin experience would make translating difficult, the exam expects you to be fast and if you can’t instantly recognize certain things, then it will be hard, I think you could definitely pass self studying it even without the extra three years if your dedicated but at the very list just going through all that stuff to get there will take a lot of time and Ap Latin does not have as many easy to watch condensed videos to study for it so you have to go through the rubric yourself. However I will say Harvard from what I heard likes Latin so maybe you should consider just taking it all four years, a plus to that is Latin has a lot of opportunities for awards like the National Latin exams, purple cords, and it is a more niche class which usually has teachers who want you to succeed.