Traveling to another world does not mean that you can be majestic and kill everyone from the beginning. They will also become humble and shrink in order to survive. Facing the approach of doomsday and destruction, we will also avoid and be unwilling to face it, and we will also just take it one day at a time.
Survive first, then develop. This is an iron law that cannot be changed.
Then start by skinning corpses, breaking through empty doors, picking up trash, and prying boxes.