Granted am tired as hell and about to hit the sack, one suggestion I didn't notice (or might have posted in a previous thread) was to go through the training accademy. Jumping feet first into the game is admirable, though you can get some of the basic game ideas down through the five different training exams (sadly the one you seem to be having the most difficulty with - navigation, the test is a bit buggy so its hard to complete every objective; despite that you can still pass the test and get an excellent for score). At first the game can be overwhelming in what you have to do just to keep your boat going where you want it to, in just a few weeks it'll become second nature and will be hungry to start focussing on tactics and learning good places to hunt.
Happy hunting
