Acting School would be a great place to start. Not only you are learning and training your tools to be a better Actress, you will also meet other Actors who are like-minded, and have an interest in the Acting career.
Have you check out JaxStars? ((http://jaxstars.com)
They offer stage training program for Children and Youth Talents. Which is great for beginners.
Otherwise, there's the "Acting School" ((http://theactingschool.org)
of South Florida, where they provided technique training and conservatory program that allows you to learn everything about Acting.
At the end of the acting program, there's usually a theatrical production with invided audience, to see your performance.
The School Bullertin Board often post local casting calls as well.
Places that I would advice you to avoid: John Casablancas and John Robert Powers School.
When you have the training and ready to jump into the world of Acting, then these are some books that you might find helpful:
"Breaking Into Acting for Dummies" by Larry Garrison - Don't let the name of this book threw you off. This book covers everything from headshots, agents/managers, casting directors, postcards, compcards, technical terms, workshops... and everything you need to know about Acting Career.
"How To Be A Working Actor" by Mari Henry and Lynne Rogers - is also a great book, but it might be too early for your age.
Last, but not least, visit http://www.florida-actors.com
- it's a free online community and resource for Actors in Florida. The website include Job Notice, Actor's Page, Book List, etc.