I want to Migrate to Next.js from WordPress

Hey guys, how you doing? i hope you guys are doing amazing. My name is Muhammad and i work as an SEO guy on a project officeinn.
This is an e-commerce store that sells office furniture, and the owner wants it to move to something faster. Currently, it is built on WordPress.

I want to know that where should i learn next.js faster, so that i convert the store to something faster than wordpress. I know html, css and javascript.