If you're coming by train, come to Hamburg's main train station. From there, it's just a hop, skip, and a jump.
Leave the train station in direction of "Moenckebergstrasse", go across the "Steintorwall/Glockengießerwall and follow the "Moenckebergstrasse" (between "Saturn" and "Karstadt") until crossroad "Barghof" (in the back of C&A). Turn left and straight forward into street "Jakobikirchhof". All in all after 700 meters by feet you'll arrive us.
Fly to Hamburg-Fuhlsbüttel. If you fly to any other airport, you'll have to take the train or a car anyway, so see those instructions in that case.
From the airport there is a direct S-train connection to the main train station. And for how to get here from the train station, see "Getting here by train".
You can find an overview of the transit connections from the Hamburg airport here: Verkehrsanbindung des Hamburger Flughafens.
Your car can be left in parking garages of “Kaufhof” or “Saturn” (Lange Mühren). From there you reach us within 300 meters. Other parking garages (near main train station or "Gertrudenstrasse" are not so near but more cheaper.