location 0 just means they have not been encountered so far, so the initial event to meet them has not happened yet, Only a few people can be moved to your bedroom and appear in the game, so moving an arbitrary person will not work and later on break their events
Areas in the town open up as you require them, also allow for the time of day, so when a shop is open, or school etc.
If you cannot follow the walkthough, at least enough to get events to play out, then just use it to solve problems and play the game, as in understand what is explained in game, and check the notes listed in your phone for short details on things needed. You will have to revisit people and talk to them at times