Hi! First off, I'm a dummy when it comes to html, css, all this, so bare with me.
I just created my website on WordPress and I'm trying to upload a free theme/template so the design is ready... But WordPress requires it to be .zip, and EVERY single theme or template (is there a difference?), is .css?
Here on wordpress.org even all the themes are .css, how do I put those kind of designs into my site in WordPress?