If you are a beginner diver, take a short course at one of the diving schools in the area, and once you are ready to get into the water, make sure you stay close to your guide. After a few such tours underwater, you will be confident enough to explore a bit further, but strictly stay within the allowed area spoken for by the guides and learn the hand signals for danger before you head out too. As human beings, it is the duty of the people to leave no polluted imprints behind, thus, do not step on any corals, try your best to not damage any of the reefs and the seabed as a number of unseen species depend on it for their livelihood. Also, beware of cuts and scrapes you might get from the sharp-edged corals, as bleeding underwater might attract the bigger fish, and that is something you definitely do not want.