So good to see a young person with PO knowledge and a seeking heart.
My advice would be:
Stay out of debt, never get into it, pay cash and live within your means.
Acquire knowledge - read (use the library, THEN buy the books you find essential), use the internet (print stuff into binders), take a class in gardening.
Stay healthy and strong. Eat well, low on the food chain, stay away from fast foods, drink lots of water. Exercise, be strong and as fit as you can. Get a bike and use it for transportation.
Do well in school. Take advantage of a free education while you can. Reading, writing, math - all good stuff, believe it or not

You may have to educate your own kids some day with what you learn now. Read alternative versions of what you are taugh (esp in history), get an overview of history and of your place within it. We live in interresting times, but reading and learning how others have lived will help us all.
Determine to be happy. DECIDE you WILL be happy, healthy and rich in what really matters - loved ones, good work, hopeful living. Read lots from the Dalai Lama, a man who knows how to remain hopeful despite circumstances; I think he is an amazing person with a wonderful outlook on life.
You do not have to convince your parents. Instead of convincing them, TEACH them by your actions. Learn to garden (even if it's just container gardening at first) and they will learn, too. Learn how to sew, and they will be curious as to why you are doing it. Learn to bike, and they will wonder why. Learn to eat healthfully and learn to cook from scratch, and they will eat with you and discover real food....

You get the picture.
And your part of the country is easy to grow things in, and has abundant water - very important.
Good luck!!