What happens next?

How to be ready for your period as a teen
Find out as much information as you can about your period.
The library has many magazines and books, and websites and counselors will be happy to help you too.
Go on to pad/tampon websites because they might have free samples.
You may need to ask your parents and they should be fine with it because after all, it's free! Also, do research. Most pad/tampon websites tell you about their products so learn which ones sound good.