PhD student looking for a single flat

I am a 25 year old PhD student at the DKFZ. I am just at the start of my PhD studies so I am looking for a long term fleat (approximately 3 years).

In short about me. I am from Serbia, Belgrade, where I did my BSc in Molecular biology. I moved to Heidelberg for my Master thesis 2 years ago and completed it this year. In general, I am a relatively quiet person. I work long hours but when I am home I usually enjoy relaxing with some TV shows, physical exercise or something similar. I enjoy cooking and I cook quite often. I appriciate a clean and neat living space :)