Does anyone know where to find diamond ore in the new tutorial world in minecraft?

Does anyone know where to find diamond ore in the new tutorial world in minecraft?
Added (1). I found the block of diamond in stampys house and 3 diamond ore in the stronghold BUT I NEED more to repair my pickaxe and armour
Added (2). I found some at x=-255 y=15 z-18 ITS IN THE MIDDLE OF A BODY OF WATER THERES THREE ORE AND ANOTHER THREE SOMEWHERE ELSE IN THAT CAVE

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