23 year old girl (Erasmus student) from Germany, looking for a room in Porto

Hi, my name is Johanna and I am from Munich, Germany. I will study in Porto at the faculty of engineering (FEUP) from the start of February to the end of June. I am looking for a room preferably closer to the city centre (Cedofeita etc.) as I intend to not only study in Porto but get to know the culture and experience life in Porto. I want to try out surfing, better my portuguese as well as get to know other people who seek to do the same. I am very organized, don't smoke and am looking to find friends in a shared apartment. ;)