Architecture student, looking for an apartment or shared flat in Madrid from September 25 to February 26

Hey, I am a 26 year old architecture student from Graz, Austria and I am about to go on a semester abroad at CEU San Pablo in Madrid at the Monteprincipe Campus. Therefore I am looking for an shared flat or apartment near Metro Line 10 (preferably in Chamberi or Argüelles) or in the south west of Madrid. My budget is around 500,-

I am a very calm and relaxed person interested in many types of sports such as calisthenics or biking. I am really into plants, techno and house music and Formula 1. I like calm evenings with friends and colleagues, hanging out in the park or a good coffee shop togehter. Since I will be abroad I am also keen on finding some travel buddies who are willing to explore Spain a little bit with me. I speak German, English B2 and Spanish A1 and during my stay I want to further improve my spanish skills.