What's the Name of That Book??? discussion

The main character is a girl who was reincarnated into a novel she read and she got a crap family who hated her so they sent her to war to die but they didn’t know how powerful she actually was and she really helped in the war even tho she’s only a child. She ended up saving the male lead who was a mercenary at the time and she brought him the residence she was staying at which belonged to a nobleman probably a duke and he really wanted to adopt her cuz her family didn't want her anymore and the ml ended up falling for her

I found it 😌 it’s called Author of My Own Destiny