Welcome aboard, Bobmunky!
I fully agree with what Fish40 and Sailor Steve wrote. You can still find mods for version 1.4, but all the latest mods are written for 1.5, including Operation Monsoon, German side Atlantic campaign.
I suggest using the tutorial missions generously. You can use them over and over, experiment, use all the controls, etc.
You'll have a lot of questions, we're all glad to help and offer advice. Some of it might even be right.
Now as the self appointed assigner of jobs on Subsim, you need to stand on the bow and hold a light so we can see where we're going at night.