You would like takea short easy trip to hamburg? Go to „Haptbahnhof“ by train or to „Hafencity“ by Cruiseliner. From Haupbahnhof take the tube line „U3“ (yellow) to St. Pauli. From Hafencity you can have a walk to Baumwall Station (U3) or take the Bus (line 6) to Hauptbahnhof.
Then there is nothing to do than following this Ubahn (tube) from station to station and you will find museums, restaurants, habour, musical, reeperbahn, sternschanze.