Welcome!
On the TreasureNet "Forum" page just under that box is a smaller box "The Hunt Starts Here." It's a quick introduction to the sport.
Toward the bottom are the "Supporting Vendors." If you take the time to go to their respective website, many of them offer detailed guides to getting started. Kellyco is a very good example of the wealth of free information readily available.
Then - get out in the field and start! Come back with your questions and you'll find many people eager to assist.
Good luck to all,
The Old Bookaroo