A prevalent theme is the love triangle aspect. Sometimes other characters are introduced to create a love triangle situation. For example, an old friend of Peter's might come back and cause some jealousy in Michelle. School life is also a common theme. Since they are students, stories might revolve around their school experiences, like dealing with bullies or preparing for exams while also having their superhero - related secrets.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Spider - Man and Michelle Jones fanfictions. Just use the search function and type in their names. Another option is FanFiction.net, which also has a wide range of works in this area.
One common theme is friendship. Since Michelle is friends with Peter in the movie, many fanfictions explore their friendship further. They might show how they support each other through different challenges. Another theme is discovery. Michelle is a curious character, and fanfictions often have her discovering new things about Peter, about the superhero world, or about herself.
Another theme is the exploration of their different personalities. Spider - Man is often seen as the more upbeat and quippy hero, while Jessica Jones is more cynical. Fanfiction may explore how they clash or bond over these differences. For instance, in some stories, Spider - Man tries to cheer up Jessica Jones when she's feeling down, or Jessica Jones helps Spider - Man see the darker side of the city. There are also themes of friendship and trust building as they get to know each other better in the fan - created stories.
One great 'Peter Parker and Michelle Jones fanfiction' is 'Midtown Moments'. It beautifully captures their relationship with cute, everyday interactions at school. Another one is 'Stark Internship Shenanigans' which has an interesting take on how their relationship develops while Peter is working at Stark Industries.