I Screwed the Novel's Plot

WARN:SLIGHT ROMANCE!! NO HAREM!! FAMILY GENRE!!Filled with political intrigue, warfare, adventure, friendship, and betrayal.---Synopsis:I transmigrated into a novel that I read years ago as the second Prince of the Chrono Empire and was fated to be killed by my half-brother, the First Prince at the age of 12.So, What's my role in this novel?Am I the villain?Am I an insignificant extra?Am I the protagonist? Nah, definitely not.But, why bother?Following the novel's plot isn't my style and I won't let it dictates my life.Regardless of my role, I am the main character of my own life.