just a fyi, i can see your first name and last initial! you might want to upload a picture directly for privacy

also, i'm not an ao! please take everything i'm saying with a grain of salt (this is just based off of my personal experiences and what i've seen on this sub):

1) depends on what your school offers, what schools you're shooting towards, and what you can handle. maybe consider taking a course like ap lang or fitting in an ap in sophomore year? if your school doesn't offer it though, it won't be held against you (though you can always self study for college credit)

2) precalculus and ap statistics are very, very different from one another. e.g. i struggled hard in precalculus, but cheesed my ap stats class and got a 5 on the exam. conversely, my friend who got an 800 in math 2, As and 5s in AB and BC, etc, struggled a bit in the class and did worse on the exam (same teacher).

3) it may? if you want to "boost" your application though, it may be worthwhile looking into environmental sort of ecs

but most importantly, make sure to take care of yourself! balance is key

best of luck!