These are a few links of interest for the queer community in Munich. Most of these will require some basic level of knowledge of German, but if you look carefully you may find some activities in English
Sub is a community-managed LGBTQ+ organization, that hosts many events and has a nice bar
LeZ is another community-managed bar, that also organizes a lot of activities
Munich AIDS help is the main resource for health-related issues in Munich. They offer counseling, as well as anonymous tests for all STDs.
If you are interested in the history of LGBTQ+ activism in southern Germany, Forum Queeres Archiv is the place to go.
For LGBT tennis enthusiasts in Munich InsideOut offers a nice platform to practice tennis.