I'd recommend 'Avatar: The Next Generation'. It takes place a few decades after the end of the original series. It follows the new Avatar, who is a waterbender this time, and his adventures. The fanfiction is full of action - packed battles and also delves deep into the new political situations in the four nations.
It depends. If you loved the TV show and want to explore more of that world, the comics could be a great choice. They might expand on characters and events you're interested in. But if you're not that into the franchise, you might not enjoy them as much.
One great Danny Phantom avatar fanfiction is 'The Phantom's New Form'. It has an interesting plot where Danny's avatar takes on a unique power. The story is well - written and keeps you engaged from start to finish.
One great Naruto and Avatar Korra fanfiction is 'The Elemental Alliance'. It combines the unique powers and worlds of both Naruto and Korra in an exciting adventure. The characters from both series interact in really interesting ways, and the story has a great plot that keeps you hooked.
Overall, it's not extremely difficult. You can start reading it and if you encounter some difficult words or phrases, you can use an e - dictionary or look them up online. With time, you'll get used to the writing style and be able to enjoy the story.