When the spirit is personified it is a way of speaking about God and his actions in the world. It doesn’t mean the spirit itself is a person, but it points to God (who is a person) and his action in the world.
When wisdom is personified in Proverbs 8:22ff it is a way of speaking about Jesus and his life with God before coming to earth. It doesn’t mean that wisdom itself is a person, but it points to Jesus as God’s first creation, who became a human and dwelt with mankind.
So it is correct to say that personification doesn’t make either the spirit or wisdom into persons. But on some occasions when the spirit and wisdom are personified then it is a way of speaking about God and his Son respectively.
I think that attempting to argue that Prov 8:22ff is not referring to Jesus is a difficult road to go down from a Christian perspective, because NT authors draw upon wisdom and take it for granted as a way of talking about Jesus, implicitly (John 1:1–18; Col 1:15; Rev 3:14) and explicitly (1 Cor 1:30). Early Christian authors identified Prov 8:22ff as referring to Jesus on all sides of the debate over Christology. In fact it was one of the most often quoted passages in the entire OT as applying to Jesus. Verses 30 and 31 of Proverbs 8 are so apt as description of Jesus that, if you believe in Jesus and believe in the Bible, then it’s difficult to avoid the conclusion that this is meant (inspired) to be taken as a reference to Jesus.
30 then I was beside him, like a master worker; (or little child)
and I was daily his delight,
rejoicing before him always,
31 rejoicing in his inhabited world
and delighting in the human race.