To bring eternal salvation, one must have an eternal priesthood. That is the position given to Jesus Christ.
Other salient points: Death is not the same as dying. Jesus wasn’t afraid of dying, he was afraid of the death.
Christ learned obedience – he learned to know the Father’s Will; he was never disobedient.
Obedience to Christ is believing the gospel. There are only two valid priesthoods in scripture: Aaronic and Melchizedec.