German girl looks for USA exchange

Dear all,
my name is Anna and I´m 14 years old.Im living in the southern part of Germany,so called Black Forest Area.At the Moment Im going to the 9th class.I would like to do an Exchange in year 2018/2019 for three months, with a Girl in my age.If would prefer to go to the east coast of the USA souther states.
I´m looking Forward to hear from you.