Mexican Student, 22 years old, looking for accommodation in Valladolid

Mexican student, like to do sports, go out with friends. I really want to travel and know a lot of Valladolid and other cities like Madrid, Barcelona, Cordoba, Sevilla, etc. I don't care sharing with boys or girls, or even if they are foreign students or local. I'd really like a place near to the UEMC, or at least with a easy way to get there.