A term for the German word "Aufbruch" with some deeper meaning

"Ya-Nun's epiphany and awakening into the pilgrimage".

MW - epiphany:

(1): a usually sudden manifestation or perception of the essential nature or meaning of something.

(2): an intuitive grasp of reality through something (such as an event) usually simple and striking.

(3): an illuminating discovery, realization, or disclosure.

One thing that might be interesting, if slightly off-center, is The progress of the pilgrim Ya-Nun. This is a bit of a play on words; "progress" refers naturally to getting on with something, and in the case of a pilgrimage, specifically it refers to the route they take; but it also refers to the famous work The Pilgrim's Progress, which might, or might not, be of interest/value depending on what else the story is about.

Ah, it seems, I've found my favorite. The idea is "going forth" making this subtitle:

"The going-forth of the pilgrim Ya-Nun"

A very similar use as my intention was is in this excerpt from "accesstoinsight.org"

https://accesstoinsight.org/lib/authors/sumana/wheel027.html

Going Forth - A Call to Buddhist Monkhood
by Sumana Samanera
© 1995
Contents

    Preface
    Going Forth (Pabbajja)
    (...)

Preface

The essay that forms the first part of this booklet, bears in its German original the title
Pabbajja which, in Pali, the language of the Buddhist texts, means Going forth, namely from the
household life to the homelessness of a Buddhist monk. The Pali word Pabbajja is also the term
for the first ordination bestowed for entry into the Buddhist monastic Order (Sangha) by which
the candidate becomes a Novice or Samanera like the author of the writings presented here, whose
illness and premature death deprived him of taking higher ordination.
(...)

It seems to allow the ambiguity, that in the foreground of the sentence/of the story is a "going" (away, leaving), but in the background is some deeper meaning (where the "going" is only secondary, and on the deeper level an actual "arriving" has happened).

I don't think there is one word for both parts together.
Separately:

got a completely new understanding, and felt, he has now "understood deeply",

enlightened

picks up all his things and started immediately as a wanderer

departed