Genesis 1:1 In the beginning, God created the heavens and the earth.
If you can believe the first verse of the Bible, the rest is of it is a cinch. It really is quite that simple. Many people can’t get past it though, therefore they will, and do struggle with all of God’s Word.
Faith is not a “leap into the dark”, it is believing what God says is true.
It should go without saying then, that if God made all things, He owns all things.