Blox Fruits Devil Fruits Guide
Eat a Logia as soon as you can for First Sea (Light is the classic travel + grind pick). Later, Buddha is the standard grinding fruit because the transform hitbox clears packs. Do not blow all your Beli on the dealer at level 10.
How you get a fruit
Random fruits spawn in the world, the dealer sells one expensive random fruit, and gacha / codes / trading cover the rest. Permanent fruits (Robux) stay after you eat something else; eaten physical fruits are consumed.
Quest XP is faster than sitting on the dealer at low level. Grab a Jungle or world spawn if you see one; otherwise keep questing until you can afford a real Logia.
Beginner fruits
Logias (Light, Ice, Flame, Magma) skip a lot of NPC damage once you outlevel them. Light is loved in First Sea because flight / light travel cuts island time. Flame and Ice are also fine starters.
Buddha becomes the grind king in mid game: transform, large melee range, pack clear. Many players hunt Buddha before Second Sea.
Mastery
Fruit moves unlock with mastery. A fruit you never use is a wasted slot. Farm mastery on the fruit you will actually grind Second Sea with — not a PvP meme fruit you unequip in five minutes.
Awakening
Second Sea adds fruit awakening (Mysterious Man / raid fragments — live NPCs can move). That is a mid-game project, not a First Sea goal.