I have a bow that I target shoot with in the yard. ...what do I do next? And is there a site where I can look at all the legal information in regards to hunting on the island?
My advice is to tune your bow to your broadheads. Usually, hunting arrowheads and target tips do not shoot the same, nor do they hit the same spot. Sacrifice some sharp blades by shooting at a cottage cheese container in fine sand (the sand will dull the blades but won't damage the broadhead). One target per arrow so you don't ruin your arrows. Have proper WOOL hunting clothing and bring PLENTY of water.
Inquire with D'Armand Cook of C & S Hunting Supplies located in Kamuela.
The Bowhunters Digest is available on ebay at a very reasonable price. The book is dated, however, basic bow tuning information is there and spot on. Also, Chuck gets into animal behavior, which is what you need to understand, to help you get close to the game you want.
A base layer of wicking material does a fine job of helping the wool ward off cold.
My Grandpop was the only hunter in my family and took me for squirrels and birds with shotgun. Once, while with him at a sporting goods store, we saw two men practicing with recurves, shooting at hay bales. Grandpop, who hunted and trapped most of his life, was of the opinion that, "those guys will go hungry using those things".
At the age of forty, I began deer hunting and in the second season started bow hunting with and old wheel compound. Now I hunt and compete with a recurve. Success's came quickly for me. Grandpop died before I started, but I often wish he could see and eat the deer I've taken.
Go for it, you can do it.