Let's see the broader context, NIV Proverbs 8:
22“The Lord brought me forth as the first of his works,
before his deeds of old;
23 I was formed long ages ago,
at the very beginning, when the world came to be.
It is talking about the beginning of the world.
24 When there were no watery depths, I was given birth,
when there were no springs overflowing with water;
25before the mountains were settled in place,
before the hills, I was given birth,
26 before he made the world or its fields
or any of the dust of the earth.
More precisely, before God made the world, wisdom existed.
27 I was there when he set the heavens in place,
In fact, even before God fixed the heavens.
when he marked out the horizon on the face of the deep,
28 when he established the clouds above
and fixed securely the fountains of the deep,
29when he gave the sea its boundary
so the waters would not overstep his command,
and when he marked out the foundations of the earth.
30 Then I was constantly at his side.
Wisdom was with God.
I was filled with delight day after day,
rejoicing always in his presence,
31rejoicing in his whole world
and delighting in mankind.
What does the begining of his path mean?
the beginning of creation.
What does the First of his acts of long ago mean?
Wisdom existed before time was created.