One Piece: Surviving With Nen

Our Protagonist gets reincarnated into the One piece world. He gets 1 Type of energy, 1 Inheritances from this type of energy, 1 Devil Fruit and 1 random Enlightenment in the energy he got. The problem is. Why is he born 100 years before the main story. I DON’T OWN ONE PIECE! I ONLY OWN MY OC! NO HAREM! I am writing this as a fulfillment story for pure fun but got the first parts planned. I appreciate constructive criticism and I am always happy about reviews