Treasure hunting is within the reach of almost everybody.
Perhaps not sunken treasure hunting, however. I certainly realize (better than most, actually) there are a number of professional and semi-professional wet treasure hunters out there. I'm certainly not saying it can't be done.
I am suggesting it is much easier for most people to get started on land. This is a little like dowsing. I'm not saying it can't be done. Some people can do it. However, almost anyone can use a metal detector. So, are you going to start trying something that apparently only works for a few folks - or go with what appears to work for almost everyone willing to work at it?
Purchase a copy of Karl von Mueller's Treasure Hunter's Manual #7. Read it. Then read it again.
Purchase a copy of Karl's Owlhooter's Manual. Repeat as above. His Waybills to El Dorado is another good one (I know it says Vol. 1 on the cover - unfortunately, there's just one.)
If you need help locating any of these fine books, send me an email and I'd be glad to assist you.
Good luck to all,
The Old Bookaroo
Then obtain a copy of Treasure Hunter's Manual #6. By now you should know what to do.
Down the road you may find (pun intended) yourself seeking and finding sunken treasure. Despite the best efforts of many people there are a few places left you can do it. But why wait? Why limit yourself? If a life of adventure is what you want, why not start now?