Well, get ready for a lot of low scoring one run losses, many in extra innings...
You might be in for a frustrating season, like looking at the boxscores to see your pitcher giving up 2 hits but losing 1-0...
Personally I'd advise against going too extreme with D, you don't need great D at every position, it's expensive while good bats are a lot cheaper since the last salary update. You should maybe trade D for good bats at 1B and one of the OF at least.
GL with your first ring quest!