Respectfully, I would instead recommend secular Buddhism and mindfulness for dealing with emotions related to your own mortality. I believe it to be a healthier alternative without the need for a belief in god, an afterlife, or any superstition.
I recommend the writing of Jon Kabat-Zinn and Stephen Batchelor.
This approach of "pick what works best for you" only works if it's actually true. Christianity claims that it is objectively true, for all people, regardless of whether they believe it. So it's not like a Christian can just change to a religion that "fits" them better on a whim.
Secular Buddhism doesn't make any supernatural claims which means it's completely compatible with Christianity. That's why it also works for atheists.
Emphasis on the secular - traditional sects of Buddhism can have gods, reincarnation etc. It may be clearer to say mindfulness instead of Buddhism as that has religious connotations. It's medically recognised for handling stress.
I recommend the writing of Jon Kabat-Zinn and Stephen Batchelor.