Hello Athenian!
I'm sorry I can't give much specific information regarding your specific situation; I'm a bit of an idiot when it comes to fixing problems, but I can tell you the main mod you need - The Wolves of Steel -
does work very well with a Steam installation.
I'm not sure how you have your game set up, but if you're having problems I'd suggest a complete wipe and re-install (I put mine on my D: drive - plenty of room with over a terabyte). Once that's done, download the latest version of TWoS, get the install instructions and follow them
exactly - it will clear up a lot of problems with SH5.
One thing - while TWoS strongly recommends installing to a directory other than default (in my case
D:\Program Files (x86)\SteamLibrary\steamapps\common\Silent Hunter 5), I haven't found a way to do that - but it works perfectly well in the default folder.
Frankly the TWoS mod elevates SH5 to
by far the best subsim I've ever played, and I've played 'em all.
...though I must admit; U-BOAT looks REALLY good.
Give SH5 and TWoS a bit of a chance; see how it goes for you. I miss the crew management of 3 and 4 too, but it has its compensations.
Cheers!