After being killed a honderd times you will get better. For me in 1943, the fun really starts (I'm using GW1.1A). I don't bother to begin in 1940, because i think it's to easy at the time (Hoping for a change with GWX though

). When i first started to play this game 90% of the time i was killed was out of stupidity. Now i like attacking convoys in 1943/1944, because it's challenge. If you play the game more and more, you wil understand what i'm saying. Just practise more. Good luck and keep sinking em!!
Grtz Tijn