The Mighty Jingles made a very good tutorial video on how not to suck at World of Warships. If you have been playing the game, I highly recommend to watch it:
"If I said to you "What's Port?" and your answer is "A fortified wine from Portugal served by the Wardroom Steward at Mess Dinners" you're either a Royal Naval Officer or someone who could probably benefit from watching this video. There's no cure for being a Royal Naval Officer, but the cure for sucking at World of Warships is just one click away."