I would attempt to get the list like this:
FotRSU-EN v1.46
Nippon v1.2.1
901_Strategic_Map_Symbols
452_MoonlightzSonarLines
International Radio mod
Fleetboat Interior-Officers Quarters_FOTRSU v1.39 EN
SEA_LIFE_SH4
1-MM's Gramophone music mix
I not sure of having success loading a previous Save though. Nothing to keep you from trying. If it bombs, it bombs and it is only the first mission. I have looked at Sea Life, and I see no reason for it to influence anything as far as AI Visual goes, so I have my doubts about that. All I can think of is maybe you started the S-Boat career, died, then loaded in other mods but didn't clear the Save folder, then started the Sargo career? I dunno. Something like that could muck-up the Save data... I have the mods myself now, and I'll fix up that mix - less your custom period music mix, since I have my own custom mix from over 300 CDs from 1940s through 2000s ABBA to ZZTop baby! It does include Benny Goodman, Glenn Miller and the like, but does have some hook-laden Thunder mixed in...