Hi I'm a relocated Canadian and I spend my summers about 130km to the west in Ulm where I do most of my racing too. From a google search I found
this link . Each point on the map is a cycling club so maybe that could be of use as you can find the closest one to your exact location. I'm sure you'll have a great time as the number of bike paths and country roads and so on in Germany is truly astounding. I'm sure most of the people in the clubs will speak English, especially since it's in Munich. Are you also a triathlete or just a cyclist? There's tons of races in the south in Bavaria and Baden-Württemberg. Every state (Bundesland) has its own triathlon league Baden-Württemberg for example has a three-tier system with eventual promotion to the Bundesliga where guys like Frodeno compete. Sports clubs (Vereine) are a huge part of German culture so joining one would be a great way to find new friends.
Also just out of curiosity how long are you going to be living in Germany for?
P.S. my biggest tip for learning German is watch TV and listen to the radio