Reincarnated as an Elf, I Have Unlimited Lifespan?

An old man who died without any descendants was reincarnated into a different world and became an elf. The old man, who had no pursuits, accepted his mediocre constitution and realized that he had an almost unlimited lifespan. He began to think about the world and the meaning of life. However, in this vast continent, opportunities and dangers coexist, and there are even various intelligent races: demons, goblins, dwarves, elves, etc. The old man is about to start his own adventure story with a new identity on this continent of Lemuria.