Don’t. It’s a train, it’s literally impossible for it to service an entire city. Unless you live within walking distance, without some way to get to the train it essentially doesn’t exist. Same situation if you live on a line, but the place you’re going isn’t within walking distance.

“There is a train” will never be enough. You also need bus routes to handle “last mile delivery” so to speak, and even then the closest stop may not be within walking distance.