Cruisers are pests sometimes, so their being pestered is only fair.
So please don't worry about annoying us, though doing a lot of search on our forums is one way to ask and get answers to your questions. Been quite a bit about earning a living, sometimes barely subsistence, on and around boats, pick and discard as you see fit. I don't know of any forum specializing in earning a living on the sea, though that is possibly because I don't.
There is a US-based (Florida) monthly newspaper for people who make their living working on luxury yachts. They are quite helpful in pointing people towards ways to find employment in the yacht industry. The Triton
Browse through there to see if any of it helps you better define what you want to do.
One observation of the majority of new members to this forum is that they don't think to include in their profile where they are located. Since we are such a wide-spread and international group, knowing where you are gets the right people interested. I assume that you are in RSA. Right?
It is my understanding that RSA requires some form of license demonstrating competence to take a boat offshore in your waters, so I assume that you should be able to find schools and courses relatively locally. Most of them will be happy to tell you how their graduates have fared financially from their courses.