Looks very realistic, however I have to question the whole premise of a train sim, trains seem to be the most boring vehicle to choose here, they run in tracks so not much freedom, basically accelerate and brake.
Then you know nothing about trains and the track networks they run on, which is probably why you dont find them interesting. Thats fine, just realise there is much more to trains than accelerate and brake :)
Well TBF OP is more or less correct, and I say this as a person who is pretty much into trains (although not train sims specifically). All a conductor can do is accelerate and brake - respect speed limits, brake in time so you don't overrun the platform at the next station (for passenger trains), be on the lookout for people/vehicles crossing the tracks illegally (and hope that they get out of the way fast enough, because once you see them, it's usually too late to stop in time, unless the train is really slow), be careful (especially when you have a freight train) not to be too slow before an incline, otherwise you might not make it all the way up etc. etc. Where you go is not your decision, the points are set remotely.