What you quoted is not a sutta, Gad.
- Jataka stories are not suttas.
- I am not quite sure about their origins and have not read them. Most translations are old, and there are likely to be many translation errors.
- We do not discuss them in this forum.
To get to the Buddhahood, Paccekabuddhahood, or Arahanthood, one must comprehend the Four Noble Truths/Paticca Samuppada/Tilakkhana. I discussed this in “Key Problems with Mahāyāna Teachings.”
- We only know how to get to Arahanthood, as taught by the Buddha.
- But the Buddha has described the efforts of some previous Buddhas and himself in the “Mahāpadāna Sutta (DN 14).”