God made us from the "dust of the earth." He breathed the breath of life into Adam's nostrils, bringing him to life. Afterwards, he created Eve from a rib taken from Adam himself. Therefore, Eve is "one" with Adam. So, God created the first original human from the dust and soil of the earth. Being the first couple, Adam and Eve had children, and their children had children, and so on. They gave rise to the entire human race, so we could assume we are all just one, huge extended family.
It's complex it starts with environmental change causing adaptation of micro bacteria over millions of years that caused the bacteria to eventually evolve to where we are now but we are not done we are still evolving who knows how we will look in the next million years
When the earth was formed after the Big Bang, supposedly asteroids that fell to earth had in them amino acids, which are the building blocks of life. Over an unfathomable amount of time, billions and millions of years, these formed into bacteria to animals, to primates to homo sapiens, our species today. Species changed due to genetic mutations. For example, say a giraffe was born with a freak gene -- he had a really long neck compared to all the other giraffes. That giraffe lived longer that the other giraffes because he could reach higher leaves and eat more, thus not only living longer and being stronger, but living long enough to make lots of baby giraffes with those same freak genes that made them stronger. Over millions of years with this stuff happening, humans eventually came about.