Is there a zoo near where you live? Try volunteering there. Now it will be grunt work, at least at frist. And you may be asked to things you won't like. But if you stick with it you will be more likely to do the things want to do. Volunteering looks great on college applications. By volunteering you will get inside look at things. This will help you decide if you want to pursue this as a career. Also study hard and get good grades in high school. I hope the best for you as you decide your path in life.
-Scott