Yeah AS, take it while you can. Even with a green crew and you feeling like you didn't do things right, you made out very well. Especially sinking a battleship on your frist patrol.
I did the same on my first patrol in AM29, I too sank the HMS Rodney on Aug 13th 1940.

But, I had clear weather and none of the damage you had. You are indeed very lucky. ~S!~
My screenshot is here near the bottom of the page.....
http://www.subsim.com/radioroom/show...=83681&page=51
BTW, it took me 6 torpedoes to sink it. One missed with 3 hits stopping it dead and then 2 more to finish it off.