looking for a single room in a shared flat in Heidelberg

I'm Michele Ceresola, I'm an italian student and I'm 23, I study Medicine in Florence and in the second semester, from March until august, I'll be in Heidelberg for the Erasmus, in partucular I'll be doing a traineeship in the hospital. I speak Italian, English, French and I'm improving my deutsch. I do not smoke. I have been living alone for 5 years, so I can cook, especially italian cuisine, I can take care of the house and I do the cleaning regularly.