Hello, how long have I to wait for the beta test? Its my first time and I want to know if that normal and how long is the regular waiting time.
The current status is: "Warten auf Prüfung", in English it should be "Waiting for Review"
How long to wait for TestFlight Beta
It seems you are doing an external test.
If this is the case, then "Waiting for Review" means you haven't submit your build to the App Store Connect. For external test, your build should be reviewed and approved.
Once your app is approved, the test begins. It can last for 90 days. But you may stop the test when you wish to.