I have no idea what ROV opportunities are open to you in India, but spending all that money in Australia will likely prove to be of little benefit for other countries (other than India) as you would be looking for international work as an ROV trainee touting an Indian passport.
Agencies won’t take someone on with that level of experience (trainee requiring a work permit for any country except India) for international work.
A company (ROV operator) might take you on, but I would think that your only likely source of initial employment would be to have an Indian company take you on locally. You’ll need the kind of experience you mentioned earlier, before you look around on a global scale.
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