Context is key
In Biblical cosmology day one has a beginning and ends with day two of creaction Gen1:1-5.
The heavenly hosts were not yet created before the universe came into being. The exact day of their creation is ambiguous
According to God’s account in Job
“when the morning stars sang together and all the sons of God shouted for joy?”
The heavenly hosts were present from at least day 4 onwards as the stars were made on day four. There is no indication that anything other than God existed prior to creation. So even if they were created on day one, they did not take part in their own creation. The stars and the sons of a god were not active in the creation, they were merely rejoicing according to God in Job.
So why the plurality?
We have the Spirit ruach of God
“The earth was without form and void, and darkness was over the face of the deep. And the Spirit of God was hovering over the face of the waters.”
We also have the et (alephtav) which is the direct object pointer to the second person of the trinity and anything related to Him such as lineage or covenants. This is evident throughout the whole OT but it’s a topic all into itself.
The NT writers say that He is the creator and they had to base this on Scripture. Because just like the Bereans the New Covenant has to be grounded in Scripture (OT)
What text in the OT says Jesus was the Creator? The et (alephtav) making reference to Gen1:1 and John1:1. John was drawing a big inference to Gen1:1. The passage in Proverbs 8 is not alluding to Jesus but to the personification of wisdom. Sure Jesus is wise but since He is the Creator the logical out-workings of the Proverbs 8 passage would follow that Jesus consulted wisdom during creation. And also, the Angel of the Lord, making reference to the visible God on earth and the invisible God that no one has seen except the Son.
“In the beginning, God et created the heavens and vav’et (the same et as the first) the earth.”
Compare the similarity in John and the lack of similarity to Proverbs 8
“In the beginning was the Word (the et is referred to as the word in Hebrew), and the Word was with God (as seen in Gen1:1), and the Word was God (as stated by statements like Gen 1:26). He was in the beginning with God. All things were made through him, and without him was not any thing made that was made.”
Therefore anytime God interacts with man physically it is Jesus preincarnated as the Angel of the Lord. Any time the Spirit of God is mentioned as acting on His own, this is a separate and distinct person. And any time God is mentioned but not seen, just heard it is most often the Father. John 1:18 John 6:46
In context therefore Jesus/The Angel of the Lord/The Word(et)/the Creator is speaking to the whole Godhead Father and Spirit and as they together are involved in the creation and all things created are made through Him and by him