I think we're all scared to a certain degree because I think that's just part of our biology. We as a species are typically afraid/uneasy when it comes to things we don't understand and death is something we don't fully understand yet.
Honestly, I think most if not all people deal with fear of dying at least once in their lives. It's normal. Just think that everyone dies eventually, it just happens, there's nothing you can do to stop it. So don't take the life you have now for granted because you won't always be here. Try to be as happy and fulfilled as possible right now while you're alive. Thinking about it won't do anything. I think nothing happens after you die, so I'm not scared of that at all. I'm more scared of how I'll die, I don't want to be in pain or go too young. But I think everyone thinks that.