A Zombie in a World Full of Curses (Female Reader)

Prologue

(The prologue takes place in another world, where you are originally from.)
.....
"I'm gonna kill you! Bastard!" You scream at the top of your lungs, but your nemesis is long gone. Bleeding from a large hole in your stomach, you cough up blood into your hand. You clench your teeth, hot with anger. "Damn! Shit! I'm not gonna die here!" Gathering up the last of your magic, you initiate a ritual that will give you a second chance at life. Using your blood, you draw a magic circle around your feet, and pour your magic into it, making it glow. Then, you take your sword and point the tip toward your chest, and tilt your head towards the clouds.

"TO THE GODS, THE DEMONS, AND EVERYTHING IN BETWEEN! I ASK FOR A SECOND CHANCE, IN EXCHANGE FOR ONE THING: MY HEART!"

And with that, you thrust the sword into your heart, until you can feel it protruding through your back. No longer having the strength to even kneel, you fall face first into the dirt, and plunge into a world of darkness.
...
You can't open your eyes, but you can feel yourself drifting around in some sort of liquid. A deep, ominous voice lets out a resounding laugh that echoes around you. "How amusing. You really didn't want to die that bad, huh?" You try to open your mouth to speak, but it won't move. The voice continues. "Anyways, since you're so amusing, I've decided that I'd honor your request. And I've picked a very interesting world for you. Oh, and don't worry about dying again. You'll be kept alive through a magic core inside your body, and it doesn't really run out, so as long that doesn't break, you're cool. Now, that's pretty much it, so I'm gonna let you go now. Have fun~"
...
You open your eyes to a bunch of faces crowding around you. You notice one has snow white hair and a blind fold, and another with sorta spiky pinkish hair. "You're finally awake!" Says the blindfolded one. "We weren't sure what to do with you, since we just found you lying unconscious in front of the front door." Ignoring him, you suddenly remembered what had happened just a few minutes before, and touch your hand to your chest. No heartbeat. No warmth. Just cold, dead skin. Then you hear the voice from earlier echoing throughout your head. "Welcome to Jujutsu Kaisen."
.....