21 years old girl looking for accommodation in Vienna

My name is Leonor. I'm French and I'm 21. I'm studying international relations and I have to come to Wien from September to January to do an internship. I would like to benefit from this long stay in Austria to improve my German, so I am looking, if possible, for German speaker flatmates. I will have to work in Schwarzenbergplatz, so I am looking for an appartment the more closed to it as possible. I love sparing time with my roommates, above all for example talking to them after a long day or discovering the city with them. But I appreciate the quiet flats, where there is not a party every evening. I am looking for a flat with internet and for a room with a big bed.