People think a lot of the after life but never stop to question the before, where we have spent billions of years. Now I can’t speak for anyone but myself but I do not necessarily remember all those billions of years as being in any particular way bad or frightening, so I’m not inclined to believe that whatever comes next should be any different.
The way I see it, life is a process of molecular interaction.
It has a start and an ending.
It didn't exist before and doesn't exist after, only during the time the process exists.
The past and future are man-made concepts.
Life exists in the present only in our living brains.
Memory and anticipation are products of our ability to reason which is governed by the process of chemical electric interactions in our living brains.
Beliving we existed before we were alive or will exist after we are dead is a delusion. A common shared delusion. A delusion propogated by religion, another shared delusion. Spiritual immortality is something we give our Gods.
Physically, our bodies have energy. The process of a cell living us the use of energy. When we die, the energy in our bodies dissapate into the energy of the Universe. Not as an entity but as a field. Like a drop of water into an ocean.