Looking for a 1 Room flat from January/February to the end of April during my studies. Budget around 600

Hello, my name is Luca Vergari, I'm a 23yrs old master student at ESCP Business School in International Sustainability Management. I'm a tidy, friendly, non-smoking person that is looking for a quiet place to spend my next semester of studying from January/February to end of April. I've already studied abroad in France and Germany in the last years so I'm used to stay abroad and interact with other people. During my leisure time I like doing sports (swimming, climbing etc.), visiting new places and merge with the local culture as much as possible (and maybe learn a bit of German). I'd love to have a place for myself but I'm also open to consider sharing the flat with another person. I'd be available to visit in person the flat if required until end of December. My budget would be around 600€. thanks!