Hello,
As we can see, your site is not slow, check – https://tools.pingdom.com/#5ef032f77f800000
Read these articles – https://xstore.helpscoutdocs.com/article/100-how-to-speed-up-my-website https://kinsta.com/blog/critical-rendering-path/
Configurate settings of cache plugin to achieve even better results. Also, you can enable Lazy loading in settings of Products elements on your Home page.
Regards