Another theme is her self - discovery. In the show, Sugar had her own insecurities and dreams. Fanfiction may focus on her journey to find herself, whether it's through her singing or her personal growth. For example, she might overcome her fear of not being good enough. This can be a really inspiring theme in many of the stories.
There's also a possibility that Jake is just an ordinary person in the fanfiction world who has been given this extraordinary ability to imprint. This could make his character development really interesting as he has to deal with the consequences of this sudden and powerful connection to the reader. He might struggle with understanding his new feelings and how to act on them in a world that may not be used to such a thing.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of Glee fanfictions, including those related to Sugar Motta. Just search for 'Sugar Motta' in the Glee section, and you'll likely find many interesting stories.
In terms of his self - esteem, it could take a hit. He might start to question himself and wonder what he did wrong. However, over time, if he focuses on self - improvement and moving forward, he can regain his confidence and build a new life for himself, whether that's alone or with someone new in the future.
I haven't come across any reports stating that Jake Tapper is penning a novel. His focus seems to be on his journalistic endeavors, such as reporting the news, conducting interviews, and providing analysis. However, it's not impossible for him to venture into novel - writing in the future, but for now, there's no indication of it.