Welcome aboard.
The good thing about the current list of mods is that they are all 'cosmetic' in that they alter the sights and sounds, or crew details. What that means is that you can switch them around while on a patrol. You don't have to start over every time.
Later mods, like those of earlier SH3 & 4 changed the inner workings of the campaign and shipping units. The game would crash if you changed anywhere but in port.
Enjoy your game.
