To get Light Fruit in Blox Fruits First Sea, start by visiting the Pirate Starter area. Here, you will find the Blox Fruits Dealer. Check if the Light Fruit is available. If it is, you can buy it directly.
If the Light Fruit is out of stock, head over to Jungle Island. Look for the NPC named Blox Fruits Gacha. You can buy a random fruit from him, which gives you a chance to get the Light Fruit. Keep in mind, the cost will increase with your level.
Another way to get Light Fruit is by using a glitch. Go to the Fire Starter area and find the Bloxwood Dealer. Click on the Light Fruit and then cancel. Next, go to the Boat Dealer and get a boat. Drive the boat to Middletown and change your boat again at the Boat Dealer. Finally, interact with any NPC to receive the Light Fruit for free.
These methods will help you acquire the Light Fruit in Blox Fruits First Sea. Follow these steps and enjoy the game with your new Light Fruit. Happy hunting!