I downloaded in my phone the tripadvisor information for Dresden and it was very easy to find. It shows you in the map of each place where it is and where you are. You can see yourself as a moving point... And it is flat. We walked all the way from the old town.

If I remember correctly tram no. 13 will get you almost in front of the place or 7 and 8 to one of the parallel streets. It is a short ride from the old city , I'd say about 5-6 stations. I walked from the Frauen kirche and it took me about 35-40 minutes of easy walk. If it's a nice weather day I'd say walk there and discover the nice streets around or take a nice bicycle ride. Like any other major German city, it's mostly flat and easy to walk and access. Hope this helps you.