Became the Lord God, but Had to Start from Scratch

One day, an "old man" took me to a place and asked me to sign a contract with the Lord God. Being a bit timid, I originally refused, but... However, his knife was a bit long, a bit sharp, and the speed of the knife was also a bit fast... Being put on hold, I had no choice but to agree, and then this "bad old man" let me be the master. But... Why is there nothing in this main god space except earth?