~~ "Why.. is there 'anything' at all ???"
One large school, that of predominantly, another continent - accordingly phrases the myth (and they are All myths - if for human dismemberment and consumption) -
... ... ...
wishes to become aware-of-'self'
(Yes, all common word referents Are doomed to fail, even in myths that, meticulously aren't selling / founding some next Corporation, complete with Servant$)
ie.
The Sole [Absolute] Wills.. thus creates: a process by which critters with the possiblility of gaining (and losing..?) 'sentience' can Be-come.
Thus doth the monad, the Unity - deal with the concept: now there is not Just The One - but Many.
(Presumably next, by reflection: so doth the Higher make/see the Lower, and with great difficulties, for a few odd ones: vice versa. Sort-of.)
As with the first fractions of a femtosecond post-Bang - we're on our own for further extrapolations (such as: the inevitability that ego shall adduce n tiresome claimants of Certainty about This and That - then the wars, new species arising after the carnage etc. blah blah)
HTH,
I,
Who Be