Keep plugging away mate, I started out as a spark offshore many, many, many years ago and these "heard it, seen it, done it all characters were there then, and unfortunately, are still here now ( they should be seasonally culled to keep their numbers down). You need to provide evidence of a basic understanding of a range of electrical/mechanical processes, and when you find a company who is crewing up (plenty around at the moment), be prepared to learn from the guys who are willing to help. Oh and ignore the ones I spoke of earlier, they’re easy to spot as well.
Nil’s illigitimus carberundum! 😛