In this dark and unforgiving world, you'll have to fight and be strong if you want to survive or be useful enough to be protected. You should probably make some friends to keep safe, maybe a local demon slayer, or even a hashira. You might even run into Nezuko and the gang, and possibly join them. Or- you could always be a demon and join the dark side. Maybe you just want an average life, but you'll still have to be wary of demons. Don't be dumb if you want to survive. You have free will.