*hugs Caroline*
Anything we could do to help?
This ^
Some thoughts, which you don't have to accept if you don't want to, but I offer them in the hope that some of them might turn out to be helpful:
Is this the last year of non-uni school for you? A lot of people here in America tend to skip out on doing as much of the schoolwork as they can because colleges/unis don't check on it for that year, but the downside is that they won't have learned anything they needed to learn in that year (for future classes).
Studying for AP tests when you know nothing is just a waste of effort. Were you not taking the courses? Given a choice, you shouldn't waste your time taking the tests if you haven't taken the courses, unless it's something you've mastered on your own. They're not free and there's effort involved, and just failing them doesn't do you any good. That said, if your parents are forcing you to take them... Well, it's their money going to waste (assuming they have to pay for them).
The volunteer work and such at least is because colleges supposedly look for that, and other extra-curricular activities. That said, when I applied to a single college in 2000 without any volunteer work, I was told the same thing, and yet I was accepted. It was a private college, though, and I expect they just wanted money. Of course, that was 16 years ago. Now they want even more money.
I would only apply to community colleges or public schools. Community colleges may or may not be harder, I'm not sure, but they're generally considered a good place to start, and cheaper. Private schools are a Bad Idea. They're expensive, and not necessarily any better than public schools.
Pretending that you did a year that you didn't seems like a Bad Idea to me. I mean, they'll have your transcripts. They'll know you're lying. Don't let your parents force you to do that. Just tell them THEY READ TRANSCRIPTS, MOOOOOM. IT'LL TORPEDO MY CHANCES WITH ALL MY SCHOOLS!
Jeez. Her doing homework is missing the point too. I avoided doing homework whenever possible, and I turned out ok except for not remembering shit I needed to remember because it turns out homework is important for building memories (BUT NOBODY EVER SAID SO, they just said DO YOUR HOMEWORK. BECAUSE I SAID SO).
Make a checklist, try to check something off of it every day other than homework? The sooner you start doing stuff, the less stuff you'll have to cram into each day. I mean, unless you're hoping they'll just give up and you can forget the whole thing and not go to college and etc.
You sound a little depressed, but maybe it's just being overwhelmed with pressure, because that is definitely a thing too. My condolences* for all your stress.
* I can't think of a better word, sorry :/