Looking for a nice single room apartment to work and live at

. My name is Arsenij and I was born in Russia but grew up in Macedonia. I am a computer science student studying at Jacobs University Bremen and currently doing my internship in Berlin. I have landed an internship for Hubspot, which is a marketing software company, and I will have to do a remote internship due to the given circumstance in Berlin. My internship is paid and I am also receiving a relocation bonus. Therefore, I will have no problems covering the starting costs and deposits.
I am quiet (since I am mostly working, but I enjoy a nice conversation when there is time for one too) and an easy-going person whose priorities are to work (from home due to the corona). I also consider myself as a very responsible and respectful person and will be very cautious with the apartment. In my free time, I like hanging out with friends, doing sports, reading, learning new programming skills, and watching series.
I am looking for a single room apartment, ideally with a separate kitchen. It has to be quite enough to be able to work from home. Also, ideally, I am looking for something inside of the ring or close to it.
I would like to move at the beginning of September and stay until the end of December (4 months). If you need any documents, please don't hesitate to contact me. I hope to hear from you and hope you are safe and healthy.