is there any way to transform my affiliate website to E commerce Website ?

is there any Envato plugin to transfer my affiliate site to an e-commerce website without using a page builder or is there any way to add an e-commerce page on my website by using any plugin.
I am using a GP premium theme without a page builder.
also, my website is loaded with lots of CSS and plugins, I have used several methods to speed up my site but it doesn’t work please suggest me a lightweight plugin for eCommerce because at the end speed matters.
My website.