I'm going to erasmus!!!

My school has selected ME (and other 3 girls from my class) out of 25 OTHER STUDENTS to do erasmus in Spain!! :D 

If you don't know what erasmus is, it's a school project where you go about 5 days to another country (a country from EU in my case) and live, go to school, and do other things while the student you switched with, does the same but in your country. And they also live in your house for those days, but i'm also really not sure if i'm right about this, but i can answer y'alls questions when i get more informations!!!

For me, i'm going to a city (which i prefer not saying the name) in the south-west of Spain, staying 5 days and kinda anxious, mostly about the fact of communication since i'm not that fluent in spanish but i know english really good, but i don't know if everyone there can speak english....

Anyways, if you have any tips for me from past experiences or if you live in Spain in general, i'll gladly accept them!!! :P