Dual Purpose by Etan Bluman

(2004/5765) Avram and his wife Sarai spent much of their lives
spreading the word of Hashem. Despite their efforts, Hashem
did not appear to them for many years. Finally, in this week’s
Parsha, Hashem speaks to Avram, telling him to leave his
home for an unknown land. What was Hashem’s main
motivation in giving Avraham this unusual command?
The Midrash states that Hashem’s primary reason
was to spread Avram’s fame, ultimately bringing in more
people to serve Hashem. Rashi quotes this very practical
reason (in his commentary to 12:1), and also quotes another
concept. According to the Gemara, Hashem sent Avram to
Canaan to start the nation of Bnei Yisrael. This first test of
Avraham’s, that of moving to Eretz Canaan, represented the
birth of Am Yisrael. Only in Eretz Canaan, says the Gemara,
could Avraham have children and start a nation. This is why
Hashem told Avraham to go “Lecha,” “for yourself” – it was in
Avraham’s own interest to move, because only then would he
merit children.
Ultimately, both of these goals were accomplished.
Avraham did have children and start a nation in Canaan, and
by visiting many places, as the Midrash indicated, he was
able to spread the word of Hashem to many more people.
Thus, Hashem’s command to Avraham provided for the
people of Avraham’s own time and for us in the future.
Hashem planned for His word to be spread further in
Avraham’s day, while simultaneously setting up the birth of
our nation.

The Chesed of Avraham by Rabbi Joel Grossman

But your Name Shall Be Avraham by Dov Rossman