There are many great resources available online for learning how to create websites using JavaScript, HTML, CSS, ReactJS, and NextJS. Here are a few options that you might consider:

Codecademy – Codecademy is a popular online platform that offers interactive courses on a variety of programming languages, including HTML, CSS, JavaScript, ReactJS, and NextJS. It’s free to sign up and get started, and you can choose from a variety of course tracks to learn at your own pace.

freeCodeCamp – freeCodeCamp is a non-profit organization that offers free, self-paced coding courses on a variety of topics, including web development. They have a comprehensive curriculum that covers HTML, CSS, JavaScript, ReactJS, and NextJS, as well as other technologies and frameworks.

W3Schools – W3Schools is a website that provides tutorials and references on web development technologies, including HTML, CSS, JavaScript, ReactJS, and NextJS. It’s a great resource for learning the basics or brushing up on a particular topic.

MDN Web Docs – MDN Web Docs is a comprehensive resource provided by Mozilla that covers a wide range of web development technologies, including HTML, CSS, and JavaScript. It’s a great resource for learning about the latest web standards and best practices.

YouTube – There are many YouTube channels that offer tutorials and lessons on web development topics, including HTML, CSS, JavaScript, ReactJS, and NextJS. Some popular options include Traversy Media and The Net Ninja.

It’s worth noting that while these resources are free, you may need to invest some time and effort to get the most out of them. With dedication and practice, however, you should be able to learn the skills you need to create websites using these technologies.