It’s a nice start, but you should try other One Piece fics to make yours unique. I can tell the beginning is well thought out, but you have to maintain that same or better quality until the end.
For example, I didn’t really plan too far ahead in my Guardian of the Destined, so it’s just there among my published works, rarely updating. One Piece is a looooong story, so focus on what you can do to catch up before committing to a series like this, okay?