I assume you do not believe in an afterlife, so think of this.

Every unpleasant or horrifying experience you have had bothers you because you have a memory of it.

But when you are dead, you will not know you are dead. There is nothing to be afraid of.

Prayer works

Hidin' Sleepy Baby-trump recommends getting infected with COVID-19. He said it made him feel 20 years younger and like Superman. Superman can't die.

Why? If we are born, we have to die. Live a good life and enjoy every moment of your life.

Live life to the fullest while you are alive that's all a person can do

you've got at least 60 more years to live.

create a bucket list and concentrate on that

It's only a matter of time. ┴┬┴┤•ᴥ•ʔ/👻

Are you expecting to die soon or is it a general fear?

Everyone must die. What do you fear about it? I believe in God and I believe that when I die I will not disappear or be alone. This life is only temporary for all of us and instead of fearing death you should consider what life means and if you believe that there is more after death.
Pray on it. Ask God to take away your fear.