Just MHO. If your goal in this game was to play as the FFG, then start there. It is a difficult platform to learn, but I have spent many enjoyable hours learning the ins and outs of how to put this platform to work. If you're experienced in the world of naval surface ships, then you'll probably be more successful than I have been. I'm an outsider (former Air Force guy). But even so, I've gotten pretty good at it.
Take one station at a time. I would recommend learning how to operate and drive your ship first. And making changes to course, speed, and countermeasure deployment as second nature. Learning where to find everything is also helpful as a start. Then move into Weapons control, weapons coordinator and learn how to defend yourself from incoming missile attacks, enemy aircraft, and enemy surface ships. And how to destroy enemy surface ships. Then ASTAC, Towed Array (whiz-wheel), TMA, torpedo control, hull sonar, and learn how to put together the tools necessary to prosecute subs.
And as you do this, you'll start to see yourself becoming proficient at the total use of this platform. This is really the strength of a game like DW. It gives you an enjoyable opportunity to learn these platforms and keeps you busy for a long time.
And If you got any advice for us amatuer surface guys who have never been out on any real ship other than a bass boat, maybe you can pass some of your experience along.
Hope you enjoy the FFG as much as I do.