Centering header in section with nav bar

Hi everybody!

I’m currently trying to create the “landing content” of my website which I’m creating with a 100vh section with a background image. My nav bar, is at the top in the section.

My issue is that when I create a header under the same section I also want the text centered in the section without the nav being accounted for the centering at all.

Can anyone help me with this please?