I'm an American exchange student finishing up a year abroad in Germany. I just joined Wikipedia and am looking forward to spending more time on here. Naturally, my two interests are Music and Germany, plus translating articles from German into English. (I'm not yet proficient enough to do the other way around!)
Once I get used to working on here, I may expound a little more on this page.
We hope that you enjoy being here, and, given your expertise, maybe you could look at the Opera houses list and see if the German ones have enough info on them.
I have seen rather longer articles on German wiki, and maybe you can find more info there to add to the English ones.