Reborn as the Duke's Successor

What will you do if u get reincarnated inside a novel as a sacrificial mob character ? Will you go against the odds and survive the story?. That's what happened to our protagonist a retired intelligence officer in military who suddenly gets reincarnated as the daughter of a powerful Duke in the Empire of Empearl. A mob character who dies even before the novel takes place!. Due to the jealousy and schemes of the conspirators against her family. In an Empire in constant chaos due to schemers and the politics of the greedy nobles and threats from neighbouring countries. Can she survive as the weak fragile character, save the Duchy from the hands of the enemies and avoid the tragic death? ***Note - Just a novice writer , please don't hesitate to criticize. I will appreciate your honesty feedbacks***