Ingame Tutorial.

[Tom Clancy's Gay Ghost]

As nice as this would be, it would also be a HUGE amount of work to make. Besides that, I feel like learning through getting murdered/accidentally lighting yourself on fire/stumbling onto a mass driver by accident is kind of the defining SS13 experience. A safe enclosed tutorial area doesn't really prep new people in the same way, because then they step into the game with less idea of the dangers of the station.