I'm a high school student and i'm just now becoming interested in cars. I read a lot about cars I just really don't know where to get started learning about cars.

Here is a great place to learn, if you're courtious and aren't a jerk. Before asking a question, look in the appropriate forum, use the search button right next to or close to the new thread button. If you don't find the information you need, post in the correct forum.
Other than here, there's http://howstuffworks.com, get some car magazines, read some car manuals, check out your local car mechanic and get a job helping out around the shop (you'll probably be cleaning stuff up rather than working on cars) and you'll see how some stuff is done.

Read the sticky at the top. That's one of the things covered.