The genre Manga "Martial Arts" is a great option for both beginner and experienced writers. It has a lot of themes and stories that are related to the martial arts.
The genre is also great at being able to tell a story through comics in a creative way. It’s an interesting medium that can tell stories even without words every single time.
Manga "Martial Arts" also has a wide range of subgenres like action, adventure, historical fiction, etc. That's why it's such an attractive genre for both new and veteran writers