21 year old guy doing an internship, looking for accommodation in Madrid

I am a social and friendly guy who likes to chill and talk with others. Sometimes it's good to have some alone time but I don't mind that people are around. I love to cook and I train martial arts. My Spanish level is intermediate right now and I am aiming to become more fluent. I would appreciate it a lot if someone can help me with finding a place to stay. I am going to do an internship in torrejón de ardoz but I would like to experience Madrid. Thank you in advance for helping me!