If you got time, learning the stations is part of the fun, at least it was for me with Sub Command (and without any book). Piece after piece, to come to fire your first ADCAP
In regards of subs only, the nice addition in DW compared to SC, is the diesel Kilo.
I'd say that first, you need to like the idea to pass a good portion of time watching the waterfalls in the sonar station and seek and classify contacts, as it is your eyes in DW.
It is there that the first adrenaline flows
