Time Travel: Light Brain Cultivation to Immortality

After traveling through time, I originally thought it was about farming, but when I encountered the optical brain left behind by my fellow ancestors who had traveled through time, I realized that this was a world of cultivating immortals. I read too many articles about cultivating immortals, and in the later stage I always relied on the male protagonist. It felt quite boring, so I wanted to write one by myself, about a mortal who has no CP and struggles to become an immortal with a female protagonist.