welcome aboard
for TMA i would recommened you to check this out:
http://www.commanders-academy.com/wi...aining_Mission
At this site there are many other good sources.
Also
http://subguru.com/downloads.html you find many good sources.
And yes you should forget everything you know about submarine tactics you have learned from ww2 the modern subs are completely different.
I dont know how much experience you have in ww2 especially your realism settings but i would recommened you to let the autocrew do the TMA first and try to learn the other stations. When you have mastered them go for TMA
