notAnotherJSDev

I went through the freeCodeCamp curriculum awhile ago. You definitely don't need any particular kind of computer to work on the freeCodeCamp curriculum, you just need a web browser!

Also, if you've already got a MacBook you're more than set for when you move away from doing everything inside a browser to working in a terminal.

Wow... Yah, whoever told you that was heinously wrong. Using any unix based system is going to be 1000% easier than dealing with a Windows file system.

And, no not really. In web development, you need to know HTML, CSS, and JS at the very least. Whatever other languages you might need, you may be able to learn on the job. If you're interested in backend development, I would stick with nodejs and make sure to learn what you're actually doing. Most of the skills you learn are translatable to other systems, the implementation details might just be different.