Well, mortified fan fiction is a type of fan - based writing. Sometimes, fans get really excited about a particular show, book, or movie and start writing their own stories. But mortified fan fiction is the kind where later on, the author might feel mortified. This could be because they realize the plot is full of holes, the dialogue is cheesy, or it just doesn't fit well with the overall lore of the original work.
I'm not aware of the Brittany Booker story, so I can't say exactly who she is. She could be a student with a great academic achievement story, or a young professional who overcame challenges in her career. There are so many possibilities without more information about this story.
Brittany is the main character in the story. She is the one who decides to run a marathon, which sets off the whole plot of her journey of self - improvement and discovery.
One way is to study the original work more carefully. Understand the characters, the world - building, and the themes. This will help make the fan fiction more in - line with the source material.
One example could be a fanfiction where Harry is mortified when he accidentally uses the wrong spell in front of the whole school during a big event. It shows his embarrassment and how he has to deal with the aftermath.
Maybe Saoirse Ronan for Brittany. She's a very talented actress who can portray strong and complex female characters. And for Alex, Ansel Elgort could be a possibility. He has the looks and the acting skills to play a character like Alex, especially if the character has a bit of a rebellious side.
Through detailed descriptions of body language. For example, if Harry is mortified, you can write about how he blushes deeply, his eyes dart around nervously, and he fidgets with his hands or his robes. This physical manifestation of his mortified state can be very effective in getting the emotion across to the readers.
One possible plot idea could be that Taylor and Leon are in a forbidden love situation. Maybe they come from different social classes or families that oppose their relationship. Their first kiss could be a moment of breaking free from those constraints, a passionate and impulsive act that sets the stage for their fight to be together against all odds.