One common theme is Matt's internal struggle with his pain. Since he's hurt, it often explores how he copes with his physical and emotional pain while still being Daredevil. Another theme is his relationships, like his friendship with Foggy or his romantic interests. How they react to his hurt state and support him is often a big part of the stories.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). It has a large collection of Daredevil fanfics. Just search for 'Daredevil Matt Hurt' and you'll get a list of relevant stories. Another option is FanFiction.net, though the tagging system there might require a bit more digging to find exactly what you're looking for.
I'm not sure specifically which story Karen Pence tells about Trump. There could be various interactions or events she might share regarding him, but without more context, it's difficult to determine.
Sure, it can be normal. Just like any person might be interested in what others write about them or their alter - ego. It's a way to connect with the fan community on a different level.
Well, it could be a way for the daredevil to see how others perceive their character. Maybe they find it interesting to see the different scenarios and relationships that fans come up with in the fanfiction.
In Avengers fanfiction, Matt Murdock is often portrayed as a complex and formidable character. His Daredevil skills, like enhanced senses and martial arts expertise, make him a unique addition to the Avengers' roster. He might be shown as the one who can sense things others can't during a mission, providing crucial intel.
We don't have enough information to know exactly who Karen is. She could be an ordinary person, a student, a teacher, or just someone who likes to read stories.