One Piece : White Tiger Vice Captain

Due to a freak fishing accident, a young man found himself drowning in the vast ocean, instead of death he woke up finding himself in a young boy's body with a chain on his neck tied to the wall. This is my first time trying to write a story that is the way I choose to follow Luffy instead of creating my journey to ease me to write my first story. So the mc will not be making his crew and will join Luffy and the gang, I will try to change a few things from canon like introducing haki early on and other stuff. i am still undecided if I should expose mc knowledge to the crew or not, if you have any advice please comment.