You mentioned assumptions then went on ahead with yours. First you assume God created everything and he created it ex nihlo.
So you don't believe that God created everything? And you don't believe that he can create matter?
Why are you asking questions about it then?
I fail to see how Genesis1:26 shows that Jesus created everything.
Who was God speaking to in Genesis 1:26? "Then God said: “Let us make man in our image, according to our likeness,"
At Proverbs 8: 22-31, as wisdom personified.....God's own son was produced as the "beginning" of God's creation...his "firstborn". (Revelation 3:14; Colossians 1:15)
"Jehovah produced me as the beginning of his way,
The earliest of his achievements of long ago.
23 From ancient times I was installed,
From the start, from times earlier than the earth.
24 When there were no deep waters, I was brought forth,
When there were no springs overflowing with water.
For the one who finds me finds life and receives favor from the Lord.
25 Before the mountains were set in place,
Before the hills, I was brought forth,
26 When he had not yet made the earth and its fields
Or the first clods of earth’s soil.
27 When he prepared the heavens, I was there;
When he marked out the horizon on the surface of the waters,
28 When he established the clouds above,
When he founded the fountains of the deep,
29 When he set a decree for the sea
That its waters should not pass beyond his order,
When he established the foundations of the earth,
30 Then I was beside him as a master worker.
I was the one he was especially fond of day by day;
I rejoiced before him all the time;
31 I rejoiced over his habitable earth,
And I was especially fond of the sons of men."
Working at his Father's side, he was the one "through" whom all creation was established.
Speaking of Jesus as the Logos, John 1:2-3 says....."This one was in the beginning with God. 3 All things came into existence through him, and apart from him not even one thing came into existence"
The canopy? The firmament separated the waters from above from the waters below and God put the sun, moon and stars there, Genesis1:14-19. We tend to call that outer space. We have earth, firmament and heaven. Since the fimament separated the waters, that puts the waters above in heaven.
Heaven has three different (main) meanings in the Bible as mentioned previously. You are confusing them.
The water canopy suspended above the earth at creation was used by God in the flood of Noah's day. It didn't come from outer space. It fell from the sky as rain.
This is the separating of the waters above the firmament (heaven where the birds fly) and the waters on the earth that God made into oceans and seas. Isn't that obvious?
2 Peter 3: 3-7.....
"First of all know this, that in the last days ridiculers will come with their ridicule, proceeding according to their own desires 4 and saying: “Where is this promised presence of his? Why, from the day our forefathers fell asleep in death, all things are continuing exactly as they were from creation’s beginning.”
5 For they deliberately ignore this fact, that long ago there were heavens and an earth standing firmly out of water and in the midst of water by the word of God; 6 and that by those means the world of that time suffered destruction when it was flooded with water. 7 But by the same word the heavens and the earth that now exist are reserved for fire and are being kept until the day of judgment and of destruction of the ungodly people."
God made the already created heavenly bodies visible in the sky. Earth's inhabitants knew nothing beyond the sky. All they knew is that the sun dominated the day and the moon at night, along with millions of stars visible to the naked eye and God put them there. Genesis is a simple explanation to unscientific people about how he accomplished actions that were beyond their comprehension.