I always recommend using SH3 Commander. It works with any mod or supermod; it allows you greater control of your crew, including awarding medals and promotions at your discretion; it lets you change game parameters with a single click; it gives names to the ships you sink; and it lets you feel like you're experiencing an actual career, just as GWX lets you feel like you're experiencing an actual combat patrol.
Take your time, enjoy the sights and sounds, and ask all the questions you want.
And WELCOME ABOARD!