23 year old girl from the states looking for accommodation in Madrid

Hi! My name is Kylie and I'm currently studying and working in Madrid. I'm looking for a shared apartment/flat/peso in Madrid, preferably the center or close to the center. I'm taking two courses at La Universidad Pontificia Comillas, one in teaching and one in Spanish. I'm also working as a language assistant in two schools. I will be working a lot but I'm also interested in living with people who would like to travel or go out on excursions in and around Madrid. I hope to hear from my future roommates soon!