Make it like the Demo

Hello support.

I would like to ask you how I can make the homepage look exactly like it does in the demo? I need the four sections under the “recent posts” section. My slider doesn’t load either. But my biggest concern is that I do not have the four sections like the demo has (“Nature”, “Tech”, “World”, and “Fashion.”)

My website is coronadocougars.net

Please help as soon as possible. I need to finish this project before my high school starts back up next week.