One common place to read One Piece manga is through online manga apps or websites that have licensed the content. For example, Manga Plus is a popular choice. Just make sure you're accessing it from a legitimate source.
You can start by getting familiar with the characters and their backstories. Then, pay attention to the plot development and try to understand the themes. Also, take your time and enjoy the detailed art.
It's highly unlikely that One Piece characters in the official story read fanfiction. They are busy with their own adventures, battles, and the pursuit of their dreams. Fanfiction exists in our world, not in the world of One Piece itself. For example, Luffy is more focused on finding the One Piece and becoming the Pirate King rather than reading fictional stories about himself or his crewmates.
You can find One Piece cover stories on official manga platforms or dedicated manga reading websites. Some popular ones include Shueisha's official manga app and well-known manga reader sites.
Well, Sabo in One Piece. He's like this super cool character. Sabo was a noble, right? But he didn't like the whole noble life of oppression and stuff. So he left. And he met Luffy and Ace. They had this amazing bond. Then that incident happened where everyone thought he died. But he didn't! He got rescued and ended up in the Revolutionary Army. He's now all about fighting for freedom and justice, just like Luffy in his own way, but on a different path. He's got these great skills and is making a real impact in the One Piece world.