What are some tips for learning javascript basics? It seems the React and Next.js combo is a common setup for custom web development. Thoughts? [closed]

I’ve built WordPress websites for many years and am now interested in developing fully custom websites. Is Javascript, React and Next.js a good place to begin?

Is learning basics on Codecademy worth it or are there better ways to learn?

Thank you

Codecademy courses
Comfortable with CSS and HTML