As Birdlover says pavers are usually set in sand. The ground should be excavated and tamped to reduce settling. You can create a soldier course around the edge or use some kind of edger board. I have clay so it really did not settle much, but you could use gravel if you need better drainage or you have more sinking issues. You would have to tamp it in otherwise you would still have the settling problem. It helps if you know the size of the pavers and how they will fit so you can size your area to reduce the number of cuts you have to make. Cover the area with landscape fabric. The sand layer is put on next leveled, watered and tamped. Paver sand is made especially for this. It helps to lock the bricks better if you use bricks that actually are made to lock together. When setting the bricks it is important to measure as you go to keep things level and if it rains a lot I pitched it so that it would drain away from the house. It was a drop of 1/4 inch per linear foot so it wasn't noticeable, but mine is only about 8 ft wide. When you are done, sweep sand over the top between the bricks. I used larger pieces of concrete pavers for my patio since it was easier to lay them and level them and I had fewer joints. I made a rectangular patio and sized it so that I did not have to make a lot of cuts. To make the cuts I rented a wet saw. I did leave gaps in my patio since I actually let the grass grow between them. It has been a plus minus thing to do since the grass does help keep the pavers in place, but it makes the patio bumpy .
Happy gardening in Hawaii. Gardens are where people grow.