It is your duty as a human being to find out what death is.
It is your duty to learn about what causes it, how it works, and what it means to you.
If you do not, then when it happens to someone close to you it will hit like a bombshell, it's megaton fallout will cut you to pieces and effect every living day that you have left.
You owe yourself the respect of being honest with yourself.
Fear represents a neural pathway you have never connected to anything. Learn and understand and you will live a worthwhile life.