This endless world

"Senior Yang Yun, how do you, as an ordinary person, survive in the crisis-ridden Lord God Space?"
"I think back when I woke up in Resident Evil 1 and found that I was a sidekick who was not in the story. In order to gain the luck of survival, I decided to become a healer..."
"That's it! The Zhongzhou team is indeed short of a wet nurse, so what do we need to learn?"
"Close combat, firearms proficiency, exoskeleton armor, light cannon, battle continuation, unyielding will, life burning... By the way, the physical fitness points are high."
"...Where are the healing skills?"
"Can't you just pour life energy into the bodies of the seriously injured?"
(This book involves infinite horror, infinite future, and the beginning of death.)