Well, that is a different question, and it is the stuff you should be learning. But since you asked…
If I were trying to duplicate this page, I would create a
div in which to put the quotes. It looks like it’s about 40% the width and centered. You can set the width of the div with CSS and then center it. You can do the same thing for the vertical. Some Bootstrap rows and cols will lay things out nicely. The quote itself needs to be centered. And those large quotation marks - I think font awesome has those, along with those social media icons.
background-color of the
body and the
color of your quote
div. It looks like they’re animated with a bit of fade.
All of those things should be easy to look up. Let us know if you can’t find something.