How can I improve codingcat.dev's performance without giving up functionality. Or is this just not possible with Wordpress?

What I have done so far

• Added CDN from WPEngine
• Started using WP Rocket to get more performance gains
• All images are served from cloudinary with q_auto to serve in webp (most of the time).
• Utilizing AMP with AMPforWP to hope for better results in Google (although this isn't my main focus).

Twitter Example

Here is a comparable site that I check often https://css-tricks.com. There is no learndash that I am aware of so might not be a 100% comparison.

https://codingcat.dev performance

My plea for help.

My Background

I come from a JAMStack world, I could make all of this better with Next.js or Gatsby or Angular Universal...but I just don't know Wordpress. I have been running my JAMStack site with sanity.io and Gatsby for years for free but I wanted more control over adding Tutors so that we can start producing some solid content with a Turn Key solution.

Financial Concern

However the finances on this project already are getting out of control as illustrated here...

What I want in the end

I hope to be able to provide a solid platform for Tutors and Users to collaborate like on Dev.to, but also get paid content similar to how egghead.io operates. However with the performance issues I just don't know if people will be happy.

Try out the site and comment below on what you thing the performance is like?
https://codingcat.dev