Missable achievement.
This achievement can be earned in the opening part of the game, in the beach area.
*** Spoiler - click to reveal ***
This achievement involves the first real puzzle you have to solve. To advance out of the beach you have to shoot three different bells with a flare gun. The gun is in a box in the cave above your head (as suggested by your sister's advice, throw an object at the metal box to knock it down and get the gun and first clip).
After you get the gun, head out to the balcony, where you will find a box with more clips. To advance the game, you need to shoot three different bells with the gun. This achievement, however, requires you to hit all 3 with a single clip (a clip holds 3 shots).
You want to start with the most difficult bell, which is high up on a pole, next to the shipwreck, a bit left of the lighthouse in the background. It'll likely take you a number of attempts to figure out the angle. In order to get the achievement, you'll need to hit it with the first shot of a clip, so if you miss with the first shot, just keep practicing with the other two. Even if you hit it with the 2nd or 3rd, retry with the first shot in a new clip.
The second bell, is to the right of the first one, lower to the ground, on a buoy in the water, more-or-less directly between you and the lighthouse. You need to hit this with the second shot. Should be substantially easier. If you miss, take a new clip and go back to the first bell.
After hitting the first two with the first two shots of a clip, the third is right behind you, just above and to the right of the cave entrance. You should easily be able to hit this to get the achievement.