The other verses that came to mind when you said that fear is something big for humans but that God isn't afraid of anything.
The first verse is
Proverbs 9:10 The fear of the Lord is the beginning of wisdom, and knowledge of the Holy One is understanding.
Fear can be healthy we need to fear or have an awesome respect for the Lord. However we should not have fear of other things.
Romans 8:15 The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “Abba, Father.”
1John 4:18 There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.