I was reincarnated into another world, but ended up in a slum - starting a slow life from scratch

After a miserable past life, the protagonist is meant to be reincarnated into a new world due to a cosmic mistake. However, another error occurs, and they unexpectedly awaken as a helpless, foul-smelling baby in a chilly, crumbling slum. Starting from the absolute bottom in the poorest environment i...