The first step is for you to actually read the story in Genesis.
Genesis 1 writes:
1In the beginning God created the heaven and the earth.
2And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
3And God said, Let there be light: and there was light.
4And God saw the light, that it was good: and God divided the light from the darkness.
5And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
Notice God creates light, and God then separates the light and darkness calling one day and the other night.
That is all that is needed for there to be an evening and a morning.
Immigration has been a problem
Since 1607!