Lelou, just go and walk around the streets/world of Ur until you come across a door with a lock on it. Some of those are seam streets.
P.S. each door needs a key to unlock them. Keys will spawn/appear close by.
also, if you are in a tower and there's a locked door in the basement, the key is likely in the building somewhere. hint: try hitting enter when you're behind something like a pillar, box, etc.
you may also find this website helpful if you get stuck or want to know more about anything: www.glitch-strategy.com/wik...