You have to start by testing your site against our Live Demo, as we run the same theme and plugins, and your site should have similar performance on any WordPress-friendly hosting. We have CDN and WP Rocket enabled on the sites + Elementor Experiments.
In case your site is slower than our Live demo, this Elementor guide will help you out - How To Speed Up A Slow Elementor Website | Elementor
Attached is a file with the settings from WP Rocket of our demo site. You can import them to your site, but please note that we can't guarantee that what works for us on our server will also work well on your site on a different server.