To that point, why don't you tell me, in broad terms, what kind of a character you're interested in making? For instance, a straightforward kind of character, or a sneaky one? A pious character, or shifty? If you have more specific ideas - like, you'd want to be a warrior or a spell-caster of some sort, you can tell me that as well. Of course, nothing you say here would lock your character into place - I just want to start a dialogue about what sorts of characters we can do.
Breilla, all of those questions apply to you as well (if you decide that you would like to join us). Knowledge of the Old Testament, particularly the histories (Joshua - Chronicles), would be very useful to you. I was hoping to have at least one player who knew their Bible

Regarding your question, the answer is compound. The where is only a little more important than the when. The campaign will most likely start in the most natural place - that is Jerusalem (although the issue isn't yet entirely decided). As I have already stated, the campaign is set in the 8th century BCE. Here is a little bit of history about what is going on in the world of the campaign;
The year is BCE 792, about 140 years (or 6 generations) after the death of King Solomon the Wise and the rebellion of the Northern Kingdom (henceforth referred to as the Kingdom of Israel) against the leadership of the Southern Kingdom (henceforth referred to as the Kingdom of Judah). Uzziah has just been crowned King of Judah; he is a righteous man who follows the guidance of the Prophet Zechariah. By contrast, the ruler of the Kingdom of Israel is a wicked man, Jeroboam II, who oppresses the poor and constantly makes war on his southern neighbors. Moreover, the prospect of war between the Egyptian and Assyrian empires threatens to make both Israel and Judah its battleground.
Jerusalem, the capital of Judah, lies near the border of Israel and Judah on the Central Ridge Route, a highway of sorts on the plateau of the Central Hill Country of Judah, which leads between the two kingdoms. The area directly north of this region, traditionally belonging to the Tribe of Benjamin, has been hotly contested between the kingdoms.
This provides a good segue to your next (implied) question, Breila. What sorts of characters would be appropriate in this campaign?
The campaign is the begin in the Kingdom of Judah; thus all of the player characters should be natives of the Kingdom of Judah. There are four Tribes of Israel that comprise the Kingdom:
The Tribe of Judah (obviously)
The Tribe of Benjamin
The Tribe of Simeon
The Tribe of Levi
Each of these tribes will have their own individual character class options. The basic breakdown is something like this:
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Warriors:
Soldiers
Holy Warriors (Paladins)
Peasant Warriors
Rogues:
Scouts
Psalmists (Bards)
Thieves
Priests:
Anointed Priests
Temple Guardians
"Wizards"
Prophets
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I use scare quotes around the term 'wizards' because prophets are not exactly wizards. There are several kits and classes that I have not mentioned in this breakdown for one reason or another. I will elaborate when the time comes

In general:
The majority of the Kingdom of Judah belongs to the Tribe of Judah. They may be of any class except priests.
The second largest group is the Tribe of Benjamin. They are primarily warriors, some of whom are highly specialized. They may be warriors or rogues (excepts psalmists).
The third largest group is the tribe of Levi - they are the priests and keepers of the temple. They may only be priests or prophets (or psalmists).
The smallest group is the Tribe of Simeon - they are the outcasts of the Kingdom of Judah, placed there by circumstance. They may be warriors or rogues (except holy warriors or psalmists).
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phew. I need to go to bed.