Stallion.,
Almost any Mac you could buy, including a used but fairly recent model, would serve the purposes you describe. If you are on a tight budget, shop by price and screen size. Consider the
refurbished Macs Apple sells.
You didn't mention if the computer needs to be portable. If so you're talking about the MacBook line. If not you can consider an iMac or Mac mini as well.
It's unfortunate that Apple offers education discounts to college students but not to high school students, although if you have been
accepted to a college then you are eligible. If you are buying a new computer heed the
Buyer's Guide advice. If you are buying a used or refurbished computer you can ignore the Buyer's Guide. If you can find a Mac to buy from someone else at your school or from a neighbor, that may be the best option of all.