Chapitre 3: Help me

Guys I don't know what direction I want to go. I done this as a spur of the moment with no planning. Should I make the MC become a police officer in Sioux Falls? Should I make him create a hidden place hide monsters who don't want to kill and live a normal life? Should I add any other series to this? I have so many ideas but I don't know what to implement. So help me 🙏