22 year old girl looking for fall semester accommodation in Zagreb

I am a 22 year old erasmus student from the United States. In spring 2017 I studied in southern Sweden as an erasmus student. I am looking for accomodation for circa 90 days in Zagreb while I complete an internship. I will be busy 40 hours a week and will likely travel on the weekends so I will not be around much. I'm looking for responsible, clean, and respectful roommates. I have lived in many different situations having changed housing every 4-6 months for the last 5 years (I love to travel). I don't smoke, but I don't mind if roommates do. My internship is unpaid so the cheaper the housing, the better. Comfortable living with either gender. Please let me know if you have any questions, also my phone number will be changing in a few weeks when I leave Sweden.