The Ein Sof sounds an awful lot like the physicists' big bang.
The big bang was heralded by many Christians as proof of Biblical teaching.
“That is why, before the Big Bang gained currency, so many scientists were keen to dismiss it, since it seemed to support the Bible story. Some clung to Aristotle’s view of the ‘eternal universe’ without beginning or end; but this theory, and later variants of it, are now deeply discredited.”
Yes, but He was much gentler! ;-) He started with three Books or spheres about 10^157 years ago (IIRC). Things just got bigger and the quantums of space-time got smaller, without form and void until about 15 billion years ago when Elohim said “let there be light”. Then matter started popping up all over the universe. This corresponds to the period after the “expansion period” in the Big Bang theory.
Somewhere after the BB; Life appears.
No one KNOWS how; while some BELIEVE how.