Studying in Argentina - International Students (Buenos Aires)

Hey dear all :)
Next year I want to move to Argentina and study Psychology at UBA.
I have been doing a lot of research, but I still have some questions.
I would like to get in touch with students that are studying at UBA and also that come from abroad to know their experiences and get some advices on how to enroll.
I will have to take some exams of the Formación Nacional and I wanted to know if anyone knew where I could find the material for it and when and where do exams take place.
Also, anyone from Portugal here? I did high school there and wanted to know how the equivalencies work in Argentina.

Mucha gracias :)

Katy