If you do not believe in any afterlife or higher power and have a belief that life ends with death, then, from that worldview, the natural conclusion would be that upon death, there is no continuation of consciousness or existence beyond the physical body. In this perspective, after death, one's body may be buried, cremated, or undergo other forms of disposition, and life as experienced by that individual would come to an end.
For many people who hold a similar belief, the focus shifts to finding meaning and fulfillment in this life, rather than seeking a reward or punishment in an afterlife. They may place a greater emphasis on making a positive impact on others and the world during their time on earth.
It's important to recognize that beliefs about the afterlife, or the lack thereof, can vary significantly among individuals. People have diverse perspectives influenced by cultural, religious, philosophical, and personal factors. It's essential to respect the beliefs of others and find what resonates most with your own sense of meaning and purpose in life.
Regardless of one's beliefs about the afterlife, valuing and loving others are essential qualities that contribute to creating a more compassionate and connected world during our time on earth.