First question to ask yourself is WHY do I want to become a surfing instructor? Your answer should ALWAYS be to help people enjoy the sport you love and to pass your knowledge to the succeeding generations. A man is immortilized by what he teaches and the friends he make along the way and not by the money he accumulates.
Become an EXPERIENECED surfer. Webster’s New World Dictionary definition of “experienced”: skilled, practiced, instructed, accomplished, versed, qualified, able, skillful, knowing, trained, wise, expert, veteran, mature, with a good background, rounded, knowing the score*, knowing the ropes*, having all the answers, having been around*, having been through the mill.
If you cannot answer YES to all of the above. Get your education so you can get a real job.