Please read through the messages posted on the site on this subject, especially in the Rookie Section.
There is a shortage of EXPERIENCED ROV personnel, there is a glut of people trying to get jobs or new starts into ROVs.
An ROV training school course is not necessarily an advantage to getting into the industry, many people pay thousands on these courses and still don’t get jobs. Others apply for the jobs and get them due to their technical qualifications/experience without having to do expensive training school courses.