Looking for A beautifully Furnished Flat for One

Searching for the right place to call home here in Berlin. What I look to find is a comfortable, nice and if possible modern flat that would allow for an enjoyable and relaxed time after a long day at work. A Place near public transportation and grocery stores or shopping malls are favored. My search is for a place that is furnished, and with my job being related to the technical industry, a home with easy ability to install Internet will be one that stands out to me. I plan to live alone without interests to flat share or look for roommates. I would be looking to find and move into a flat that is right for me by the 1st of March 2018.

I am a Community manager for a well respected Blockchain corporation and have a secure long-term job position at my current place of work. Work location is in Potsdamer Platz.