You can try Archive of Our Own (AO3). It has a large collection of fanfics, and there are likely to be many Evangeline and Jacks ones there. Just use the search function.
To start, maybe focus on the lyrics and the melody. They often give clues about the story's beginning. Also, think about what the song makes you feel and how that might relate to the start of the love story.
I don't know who the author of the 'Evangeline novel' is. There are so many novels out there, and without more context, it's difficult to determine the author.
I'm not entirely sure as there could be many novels named 'Evangeline'. It might be about a character named Evangeline and her life, adventures, relationships, or her spiritual journey. Without more specific information, it's hard to say exactly.
You could start by listening to the song multiple times to familiarize yourself with the melody and the overall feel. That often helps you catch the lyrics more easily.
There could be. Fanfiction writers often come up with all sorts of crossovers and unique storylines. However, it might take some time to sift through the results on various fanfic platforms. Some stories might focus on Naruto's relationship with a character named Evangeline's father in really interesting ways, like exploring how their interactions could change the Naruto universe's dynamics.