First, create a detailed backstory for your oc. Think about where they came from in Suna, their family, and what events led them to become who they are. For example, if they are from a poor family in Suna, it could influence their goals and motivation.
He would surely meet Gaara. Gaara has had his own struggles and he might be able to understand Naruto on a deeper level. They could form an even stronger bond than before, with Gaara helping Naruto hide from those who might be looking for him in Suna.
If Naruto ate the Suna Suna no Mi in fanfiction, it would change his fighting style drastically. He'd have to learn how to manipulate sand, which is a very different element from his usual chakra - based attacks. Maybe he'd combine his new sand powers with his shadow clones, sending clones made of sand to confuse his opponents. This would make him even more unpredictable in combat.
It could enhance his teamwork. With the power of the Suna Suna no Mi, Naruto could create sand barriers to protect his team members during battles. His new ability would add another layer of defense and offense to their group strategies.
One common theme is friendship. Since Suna is part of a team, many fanfics explore his relationships with his teammates, like how they support each other off the field as well as on. Another theme is self - discovery. Fanfics often take Suna on a journey where he learns more about himself, his strengths, and his weaknesses.
I'm not sure specifically as there could be many different takes in such a fanfiction. It might involve a necromancer in the Sand Village (Suna) within the Naruto universe, perhaps dealing with resurrecting the dead and the consequences that follow in the context of Naruto's world.
Well, there's a fanfic called 'Suna's Bond'. In this story, it shows the strong bonds between the Suna characters in Naruto. It's really interesting to see how they support each other. Then there's 'Suna's Secret Arts', which reveals some never - before - seen jutsu from Suna. Also, 'Suna's Rising Stars' is about the young and talented ninjas in Suna making a name for themselves.
It could be about a character named Sakura traveling to a place called Suna. Maybe it involves her adventures, the people she meets there, or some sort of mission she has in Suna.
One interesting Naruto Suna Anbu fanfiction could be about an Anbu member from Suna going on a secret mission in Konoha. They might encounter Naruto and his friends, leading to unexpected alliances and adventures.