You could also try following some 'Full Metal Alchemist' fanfiction writers on social media platforms. Sometimes they will share their works directly on their profiles or mention where else they post their stories. This way, you can get access to their new works as soon as they are released.
Fanfiction.net is also a good place to start. There are likely some interesting Hermione x Full Metal Alchemist fanfictions there. However, the search might not be as refined as on AO3. You may need to browse through different categories related to both Harry Potter (Hermione's origin) and Full Metal Alchemist to find the ones you like.
There are specialized anime and manga fanfiction forums. These often have sections dedicated to Fullmetal Alchemist. You can also ask fellow fans on social media platforms like Twitter or Facebook. They might be able to point you to some great fanfics that they've read and enjoyed.
Some fanfictions explore romantic relationships that were only hinted at in the original. For example, a story about Roy Mustang and Riza Hawkeye's relationship developing in a different way, perhaps with more challenges or a different timeline that tests their loyalty to each other.
Shamballa in 'Full Metal Alchemist' is a concept that ties into the complex world of alchemy. It is a place that seems to hold great power and knowledge. The story may involve characters trying to unlock the secrets of Shamballa, which could be related to the true nature of alchemy, the origin of certain elements in their world, or even a way to transcend the normal limitations of their reality. It adds an element of mystery and a greater purpose to the overall narrative of the series.
The story of Full Metal Alchemist explores themes like redemption, sacrifice, and the consequences of playing with forbidden alchemy. It's a deep and complex tale.
You should start with an interesting concept. Maybe it's a 'what - if' scenario like what if the main characters had to face an adult - only threat that the original story didn't touch. Outline your story, decide on the main plot points. Also, when writing about the characters, keep their core traits but develop them further in an adult context. For example, if you're writing about Edward, you can explore how his experiences would shape his adult self more intensely.
You could try checking local libraries in areas where Malayalam is spoken. They might have a copy of the Malayalam translation of 'The Alchemist'.
Archive of Our Own (AO3) also has some excellent Harry Fullmetal Alchemist fanfiction. The site has a well - organized tagging system that makes it easy to find what you're looking for. There are often detailed summaries and reviews for each story, which can help you decide if it's worth reading.
Fanfiction.net is also a great place. There are many Fullmetal Alchemist fanfictions there. However, the tagging system might not be as detailed as AO3. But it still has a wide range of stories from different authors, including some really creative and unique takes on the Fullmetal Alchemist universe.
One idea could be a crossover with the Harry Potter universe. Edward and Alphonse could attend Hogwarts and learn about magic while also trying to find a way to use alchemy in that world. Maybe they'd be interested in the Philosopher's Stone in the Harry Potter series, which has similarities to the concept of the Philosopher's Stone in Full Metal Alchemist.