Don't expect too much from the meal you are going to be served... Best you buy yourself some nice sandwiches before boarding or just wait till you get to your destination to enjoy a nice meal in one of the restaurants.

This train ride is no major expedition. Just have you ticket ready, don't bring too much luggage aboard and get there plenty of time ahead. Depending at what time your train leaves, you might find a passenger already seated at your place as they are known to make mistakes with reservations.

Otherwise just enjoy yourself.