What is correct in this situation?

Your answer is correct because the green traffic light gives you the right to turn left without interruption. In German traffic rules, a green light means you may proceed when it is safe, including turning left here, as there are no additional signs or signals requiring you to yield.

You do not have to wait in the center of the junction or yield to the oncoming vehicle, as the oncoming vehicle is turning right, and you have the green light permitting your turn. The general rule is that green means go, provided that it is safe and no other prohibitions apply.

Remember, when you have the green light, you have priority to move as indicated, unless a traffic sign, signal, or situation tells you otherwise.