I'm Benbo'erba, and You Want Me to Speedrun Journey to the West?

Bai Bo transmigrates into Journey to the West and, to his astonishment, becomes Benbo’erba, the catfish demon. He also inexplicably activates the “Save the Heavenly Way System.” [Current mission: Speedrun Journey to the West] As long as he advances the pilgrimage of Tang Sanzang and his disciples, he can earn rewards from the Heavenly Way. Advance the pilgrimage for the first time, reward: Great Celestial Immortal Art Advance it by one day, reward: Leap from Fish to Flood Dragon Advance it by three days, reward: Clear and Bright Spirit Platform Advance it by seven days, reward: Somersault Cloud Advance it by half a month, reward: Seventy-Two Earthly Transformations Advance it by one month, reward: Transform from Flood Dragon to Dragon Advance it by one year, reward: Six-Ding Divine Fire Advance it by two years, reward: Universe Banner of Ten Thousand Souls… Advance it by twenty-five years, and ding! The System upgrades… Sun Wukong has already been trapped beneath Five Elements Mountain for four hundred and seventy years. Jiang Liu’er is also drifting toward Jinshan Temple. It’s about time for me, Ancestor Benbo, to make my debut… The journey west has barely begun. Tathagata is seated in meditation. After only three days, he pinches his fingers and emerges from his trance: “How did this pilgrim reach the foot of Spirit Mountain already?” [Journey to the West setting, not the Primordial World. The wider world is based on the Classic of Mountains and Seas. No disparagement of immortals, gods, or Buddhas.]