So right at the start i am stuck at Red signal...there is a train that comes on the same block opposite direction...and no way around this issue...
Whenever you have a problem service like this, try to spawn on foot 5 minutes before the service is scheduled to start and take it over manually. This usually resolves issues with the dispatcher.
I'm on Steam and there seemed to be no problem. After the eastbound train (which is a local service from Lohr and takes the opposite track after Langenprozelten) pulled into platform 1, the signal turned green and I was able to move. I started from Journey mode.