how to center logo

Line 654 of your style.css, edit to this:

.site-title h1 {
     margin: 1.25rem auto 0;
     width: 440px;
}

If you’re not using a Child Theme, and if the theme doesn’t have a designated section of the dashboard for CSS modifications then install this Custom CSS Manager plugin https://www.ads-software.com/plugins/custom-css-manager-plugin

Then use its “CSS Code” section of the dashboard to hold your CSS modifications:

Alternatively use your Child Theme style.css file to hold your CSS modifications:

.site-title h1 {
     text-align: center;
}

https://www.w3.org/Style/Examples/007/center.en.html

What Andrew said ??

Thank y’all so much. The custom css worked….

Now I have one more question. Is there any way I can move it up just a tiny bit?

There was some padding on the top as I recall, in your original theme it’s 1.25rem. So you’ll need to reduce that a bit.