Ah well! Have never played as a Thief and dislike it! Did try once but when you have to steal from innocent people like the Lady on a Rocker gave up in disjust. Prefer the other roles!
And the thieve's Guild is the easiest to find. Talk to Bruno at Town Gate and then to the other thief in the alley who tells you the password...Oh! That's easy in Spielburg.
Anway have a good time if you prefer that despicible class Ginjah
!