Welcome aboard Ferrante
.. Do the training missions as susgested ... you'll learn alot ......... then start a campagin like in 1939 ...... Take your boat out for a spin and see what she can do ... the first few missions are pretty simple and you aren't sent too far from base ....
After a couple missions completed , read about some of the add on mods .. I would not susgest the GWX until you get the hang of things ... I would only susgest some of the eye candy mods for a newbie ......