I’m a secular Jew and I was wondering if anybody knows what part of the Middle East Avram was from before he became Avraham and was promised the land of Israel?

I’m just trying to figure out, if Avraham was our first forefather, what part of the Middle East we were indigenous to before we were promised the land of Israel.

I’m a bit confused though about who was actually the first Jew?

Avraham had a covenant with H-shem and Adam talked with H-shem but when does our actual history start?

And does that coincide with the land of Israel and that’s why we’re indigenous to Israel and not wherever Avram was from?