Student (maestria/master) looking for a comfortable room to spend four months from March to june. I am gonna study at Flacso.

Hi I need a support to find a good place, I am brasilian speaking English and little Spanish. Expecting to spend a good time in Argentina. I would like to practice Spanish but I will do it in Flacso, so no matter the language people speak inside home. If the the house/flat was placed near Flacso it is better, but if it don't, is important having a good transport way, like subway.