Yes, a question which is asked at least several times a week 🙂
As suggested read through the FAQ (link over on the left) as well as the Rookie section on here.
Doing an introduction course (for this is all they really are) will at least give you an idea of the rov industry. Some of your skills will be transferrable certainly, companies employ trainees for their technical skills as you cannot learn to become an ROV pilot until you get a job as an ROV Pilot. So they look for people who can repair and maintain the equipment primarily.
I would suggest you maybe look at your electrical, electronic, hydraulic and fibre optic skills and qualifications and your money may be better spent on improving these. This way, if you do not get a job in ROVs you still have qualifications and skills which are useful in other jobs. An ROV course is only applicable for ROV jobs.
Be aware there are a LOT of people trying to get started in ROVs, one course of 8 trainees have over 1300 people apply for example. It is difficult to take on a lot of trainees as there are only so many jobs you can be sent on until experience is built up which is why several hundred just cant be taken on and put to work.