To write a good young Nathan Drake fanfiction, you need to understand his background. Incorporate elements from his upbringing and family life. Create believable relationships for him, whether it's with a mentor or a fellow young adventurer. You should also focus on his growth as a character. For instance, start with him being a bit naive but gradually becoming more confident in his skills. And don't forget to add some action and suspense. Maybe he's being chased by some local thugs while on the hunt for a hidden object.
When writing young Nathan Drake fanfiction, start with a strong hook. It could be something like Nathan finding a strange object that sets off his adventure. Then, build his character. Show his curiosity and his eagerness to learn. You can also add some humor to the story. For example, his clumsy attempts at climbing a fence in the beginning. As for the plot, make it engaging. Have him face challenges that are appropriate for his age, like dealing with a strict librarian when he's trying to access restricted books about ancient civilizations. Also, make sure to end the story in a satisfying way, whether it's him solving the mystery or setting off for a new adventure.
First, research about Nathan Drake's character traits. Know his adventurous nature, his intelligence, and his determination. Then, come up with an interesting plot that fits his young self, like a mystery in his neighborhood. Also, use vivid descriptions to bring the story to life, such as describing the old attic where he might find a clue.