How can I tell where on the platform my reserved coach will stop?
There are train composition posters and digital information signs on the platforms, showing at which letter on the platform your coach stops. The number of your coach is shown on your ticket, so you can tell where you have to wait in order to board the train in the right place.
It can happen that the train comes into the station with the coaches in reverse order, in which case you will be informed by a public address announcement.