One piece: A tale of freedom

Born with great abilities in a dangerous world where only the strong have a right to speak, I want to explore this new world and find out the secrets which were not shown and achieve freedom through power. Just a few problems... I don't know much about this era and there is possibly the most powerful person of this time and clearly the most insane laughing in front of me. This is a fanfiction of one piece where all characters belong to their respective owners(I might add a few from other anime) except my OC.