classes in high school aren't that big a deal. as long as you take calc 1 and statistics you should be fine. you will probably re-take those classes in college anyways. i know people think if they take a class in high school they can skip it in college but usually the college courses cover a lot more material than high school courses. also, if your high school offers an accounting or finance course i would suggest taking that just because some people major in something and then decide they don't like it so save money by making that decision now.
i don't know the good schools in florida but i am sure you can google it.
accounting is one of the few industries that still has job growth despite the recession. you can be an internal accountant (just sit in a cubicle and crunch numbers all day). that is good if you are not a people person, but those types don't make that much money.
you can also be a public accountant and work as an auditor, tax associate, or consultant- with a finance degree you will probably have a better chance working on the consulting side than people with just an accounting degree. as a public accountant you will need to pass the CPA exam (its like the BAR exam lawyers take, but for accountants) but you will also make a lot more money. you have to be a good people person, though.
with a finance minor you can also probably work as a financial analyst, but that requires much better math skills