WP Rocket is the easiest caching plugin to get started with - its defaults are better than most plugins' best settings. But 'better than nothing' and 'properly optimized' are not the same thing. The features that make the biggest difference - Remove Unused CSS, JavaScript delay, and CSS/JS combination - all require per-site exclusion lists to work without breaking the layout or functionality.
I have seen the pattern repeatedly: a client installs WP Rocket, enables everything, their PageSpeed score improves from 40 to 65, they think it is done, and then three months later a customer reports the checkout is broken on mobile or the contact form stopped submitting. The cause is almost always a JS delay rule that caught a script it should not have.
Correct WP Rocket configuration requires testing the full site after each aggressive setting is enabled - forms, checkout, sliders, popups, and any JavaScript-driven UI. That takes time but it is what separates a 90+ score on a fully functional site from a 90+ score on a site with hidden breakages.
My Commitment to You
I communicate clearly, meet deadlines, and do not disappear mid-project. If something does not work as expected, I fix it. That is why my Upwork score has stayed at 100% across 100+ projects.