Looking at it now, I wish I had spent my money on doing an ROV Pilot Tech course rather than doing all of my Part-66 modules, but it's a similar situation, where you can pay thousands on courses and still struggle to get into the industry.
From what I've read, it appears that the oil industry can be a bit like aviation in that most of the time it's not what you know but who you know when it comes to getting a start in the industry.