21 year old guy looking for accomodation in Madrid

I'm a 4th year engineer student looking to find a room for a 1 semester stay in Madrid. I will be there from the beginning of September until mid January. I stayed in France for all my life and this will be my first experience in a foreign country but I'm good enough in english to speak easily. I really enjoy listening to music and I like to do sport and watch films and series from time to time

I'm curious to meet other people and learn about their culture. Usually I am someone discreet although I like to go out when I can to have a drink and visit places. I'm tidy and not noisy and I will make sort that we get along as much as possible.