Well, without more specific details, it's hard to say precisely. It might be a story related to the chaos that often occurs in their family. Maybe it's about a prank they played on Malcolm or something funny that happened in the neighborhood. Dewey has a creative mind, so it could be all sorts of things.
The graphic novel probably represents Malcolm X's character through his actions and words. His charisma could be depicted in how he interacts with others in the story. His courage in standing up against injustice would be a key aspect of his character representation. It may also show his evolution as a person, from his more radical views early on to a more inclusive stance later in his life.
Malcolm and Marie is purely fictional. The plot and characters are made up to tell a compelling story rather than being based on real events or people.
It's not based on real events. The plot and characters of Malcolm and Marie were crafted by the writers' imagination to tell a compelling fictional tale.
There's a chance that Jamie himself could rescue himself. He might be really smart and find a way to outwit Phil Sanfino. Maybe he discovers a weakness in Phil's security or manages to turn Phil's minions against him. This would make Jamie a very strong and independent character in the fanfiction.
Jamie is likely the main character in the story. Since it's his story, he's probably a kid who has some connection to the 'b93 roofsit' which could be an event or a location. But without more details, that's about all we can say.