I can only imagine what must be going through a 14 year old's mind at the thought the world might end. The closest I can come is remembering what it was like for me when I heard about a weather balloon launched from some scandinavian country that drifted into Russian airspace and came within minutes of starting a nuclear war.
Let me try and reassure you that if you're living in some small town in Ohio- or maybe even in a big city- you're starting off in great shape to get through PO and help switch us to a nuclear or renewable-based economy.
First off, you're living in the Midwest. Even with some of the most doomsdayish scenarios (which I don't ascribe to), the Midwest will always wind up being able to grow enough food to feed itself. When oil-based agriculture comes to an end, there's a good chance that we won't even be able to have the energy to cart food out of Ohio.
The fact that Ohio grows so much food- and that there aren't a whole lot of people there- means that all those further-out claims about nuclear war and martial law probably won't hit home- especially if you live in a small town or live out in the country. Ohio also might not be that much of a tactical target for anyone looking to launch missiles at us.
A lot of the scariest claims for PO should be more frightening to folks living on the East or West coast- where there's no way for people to get enough food to eat.
Here's a couple of things an intelligent 14 year old can do:
1. Keep doing well in school and stay in marching band. To be honest, there's so much more that you can learn there that's going to help you help us rebuild after Peak Oil hits. If they offer an Agriculture class at school, you might want to think about taking it. (If peak oil doesn't hit, it'll be pretty interesting to learn about how various foods wind up on your dinner plate. If it does hit, you'll be able to help people do a better job of growing food.)
2. If you don't have a busy summer, get a summer job. You're 14 years old; a lot of people will hire you. You can save up some of the money you make, or if you're feeling confident enough to put money in the stock market, put some of the money you make in oil stocks like Chevron (See
http://finance.yahoo.com/q?s=cvx) or British Petroleum (See
http://finance.yahoo.com/q?s=BP)
3. Start reading up on how ethanol and bio-diesel get made, and how we get electricity from various sources of renewable energy (IE: wind and solar).
4. If you think you might go to college, try to plan on a school in the Midwest. (There are so many good schools in Ohio.)