Adrienne,
Like you, I was a very determined kid during high school. Having work alongside my dad at an Asian bistro, I've learned so many traits in both cooking, and work ethics. Being in a kitchen can be a very stressful environment, and can certainly "make-or-break" someone while working. I'm not sure how old you are exactly, but I would definitely suggest doing your research and trying to get into a seasonal job at a kitchen. I find this more beneficial opposed to after-school culinary programs because it will mold your perspective about getting serious in this type of profession from actual experience. However, added education never hurts...
try looking for seasonal jobs at your local restaurants. If not, try craigslist. Just be aware of scam ads.