Shabbat Shalom!
The book of Numbers opens with a census of the Children of Israel. This population count prepared them for entry into Israel, and reminds us today of the value of each person.
Why did the children of Israel receive the Torah in the desert of all places? The desert is often a lawless place, a wild west with untamed residents. The Torah provides stability and order, and reminds one that obedience matters, even in the desert.