Oh my I wrote this terribly wrong! Sorry.

 I can help an advanced Spanish student who is a native English speaker. 

Hi Ana, 

I just sent you a message, but if you don't get it and are interested in an exchange, just let me know.  I'm not a teacher but am a native English (American/Californian accent) speaker and have a good ear thanks to both my profession and having languages as a hobby.  I'm not shy about making corrections for others as I know how much I want people to correct me!  I love DF and Mexico and it would be fun to learn more about daily life there.  

Saludos, 

Emily