Improving Score Metric "First Meaningful Paint"

Hi there,

I just read this article (https://premium.wpmudev.org/blog/improve-first-contentful-meaningful-paint/) on WPMUDEV's blog, and I would love if someone could help me to understand what exactly I would have to do if I wanted to minimize the number of render-blocking external stylesheets and scripts.

I am assuming I have to configure something in the Asset Optimization of the Hummingbird Pro plugin. – Right?

I am a little worried, that if I press any of the buttons there, that I could break the site. What is the recommended approach?

Thanks for your help, guys!

Kind regards,

Katrin