I have tested my website using the Cloudflare Diagnostic page. Here is the only error it produced:
After I got this result, I watched some videos on YouTube about how to improve your speed with Cloudflare. It was recommended to try this plugin:
I enabled the cache using the plugin, as well as purged the cache using recommended settings.
Here are the settings I also have in Cloudflare itself:
I also have a separate plugin for compressing images.
I’ve also tested my page speed using webpagetest.org:
I’m not very technical, and cannot figure out what I could be doing wrong.