Sourrounded by shopping stores, coffees, cinema and international restaurants (Hakescher Markt) you would have no problem finding what you need.
5 min away you will find the center of commercial stores and gift shops at Alexanderplatz.
Nearby in walking distance, is also "Die Museumsinsel" the area with all historical and national museums, the opera house, Berliner Dom etc.
you will see in the map you that you are well situated. The next grocery store would be Kaufland or Bio Company.