In this fanfiction, the main character's life would be completely transformed. They would have to balance their normal life, like going to school or work, with their new role as a sort of superhero. Their relationships with their family and friends might change too. Some might be scared of their new powers, while others could be supportive. And as they grow into their powers, they might develop their own unique style of using them, different from the original Spiderman.
The character with the Spiderman powerset would likely face some sort of conflict. Maybe there's a supervillain in their town who is causing trouble. They would have to learn how to use their powers effectively to stop this villain. Along the way, they could also make some new friends who help them in their journey, like Spiderman has his friends in the comics.