What's an easy to use website builder?

I know how to use computers, but I don’t know what makes them work. I know how to use the Internet, but I don’t know anything about HTML.

I’m trying to find a website builder that is easy to learn and is free. I already have the domain name. I already have a website, but it was built with a free template supplied by the web hosting site, which was super easy to figure out and is unbelievably easy to maintain. My only real complaint is it’s unimaginative.

I’ve heard of Joomla, and I’ve seen a lot of sites built with it that are very nice. Honestly, they lost me on the second youTube video of instructions, and there were nine more after that one.

Is that the best one, or is there something even easier?