I level up using my soul system

my mom died, killed by my dad in the most horrific way,then my auntie took me in. Shit was sweet at first.... until it wasnt. She promised to protect me from my dad's bloodlust,but i also wanna protect myself and her. Then i find out things i thought only existed in anime,Soul systems..... this is so much info to take in all at once but auntie says the world isn't all sunshine and rainbows....... fucking hope i adapt to it before someone slits my throat.