The story of Arthur Morgan in RDR2 is quite extensive. It can take a significant amount of time to complete, depending on how much you explore and engage in side activities.
The fact that they are both survivors in a tough world. In the Red Dead Redemption universe, they've both faced hardships. A fanfic can explore how they support each other, grow together, or even have conflicts based on their different experiences and personalities. This makes for a rich tapestry of stories. For example, they could go on adventures together, and we get to see how their relationship evolves during those times. It's also interesting to see how their relationship might be different from the more traditional relationships in the game. There are so many possibilities for the writer to explore different emotions, like loyalty, love, or even just mutual respect between them.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). There are often tags related to the specific characters, which can help you narrow down the search. Another option is to check out some Red Dead Redemption fan forums where fans might share their favorite fanfics.
To progress the story in RDR2 online, focus on following the mission prompts, joining multiplayer activities, and exploring the open world to trigger events. Also, keep an eye on updates for new content and storylines.
The RDR2 online story doesn't have a fixed duration. It depends on your playstyle and the quests you choose to complete. Some players might finish it relatively quickly, while others could spend many hours exploring and experiencing all it has to offer.