You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Zelda - related fanfictions, including many about Zelda and Ganondorf. Another option is FanFiction.net. There are also some Zelda - specific forums where fans might share their own works or recommend good fanfictions.
In my opinion, the story of TotK is quite good. The plot is engaging, the characters are well-developed, and the world-building is immersive. There's a nice balance of action and emotion.
The length of the main story in TotK can vary depending on how quickly you progress and how much exploration you do. Generally, it can take a decent amount of time to complete.
One great 'Zelda and Ganondorf Fanfiction' is 'The Battle Beyond Time'. It delves deep into their eternal struggle, showing a more complex relationship between them. Another is 'Ganondorf's Redemption Arc' which takes an interesting turn by exploring Ganondorf's possible change of heart. And 'Zelda's Understanding' is also good as it focuses on Zelda trying to understand Ganondorf's motives rather than just seeing him as a pure villain.
Power is a very common theme. Since Ganondorf is often associated with his thirst for power, many fanfics explore how he obtains it, uses it, or loses it.
The Legend of Zelda: Tears of the Kingdom (TotK) is set in the same world as Breath of the Wild. Link awakens on a sky island. The story involves Zelda disappearing and Link's quest to find her. Ganondorf is the main villain again. Link has to explore the sky islands, use his new abilities like Ultrahand to solve puzzles and build things. He also has to traverse the surface world and the depths. There are various races and characters that help Link on his journey, like the Sages. Overall, it's a story of Link's heroism and his journey to save Zelda and Hyrule from Ganondorf's evil plans.
The 'Tears of the Kingdom' (TotK) full story is complex. It involves Link's journey in Hyrule. He has to deal with the upheaval caused by Ganondorf's return. Link travels across the land, using new abilities like Ultrahand to solve puzzles and defeat enemies. There are also the mysterious Zonai devices to figure out. Overall, it's a story of Link's quest to save Hyrule once again from Ganondorf's evil plans.
The length of the TotK story can vary depending on how much you explore and complete side quests. On average, it might take around 50-60 hours to finish the main storyline.
It depends on how you play. If you rush through, it might take around 30-40 hours. But if you explore every nook and cranny, it could be 60 hours or more.