21 y.o. portuguese looking for a place to stay in Helsinki during erasmus

Hello! I´m Paulo from Coimbra, Portugal. I'm currently studying Pharmaceutical Sciences in Universidade de Coimbra and next year I´m going to Helsinki on Erasmus. I´m going to study in Vikki Campus, so I´m looking for a room halfway between Vikki Campus and the city center, but I am open to any other options. I found a Greek friend in the same position as me, also going to study in Vikki Campus and we are trying to find a shared apartment. Our maximum offer is about 500€/month. I really thank you all for the help!