Cool stuff. I was recently having this idea of putting my CSS in a JS file and inlining it when the page loads. Are you using it in any project? How maintainable is this?
Since you said web design, I am assuming you want to build a website.
So, Ruby on Rails.
Rails is a stack that has:
Ruby - a very simple developer friendly language. This is responsible for putting together
JavaScript - this lang is responsible for all the fancy stuff you see on websites. The animations and all.
HTML, CSS - this is the stuff that websites are made of. Ruby and JavaScript are used to generate this the way you want.
I used to be an accountant and started coding in Nov 2014. I have many rails apps ever since as prototypes and maintain one app that is in production (meaning people use it).
I used this Rails Tutorial by Michael Hart (https://www.railstutorial.org/book) significantly. You will end up with a cool website at no cost at the end of the book.
I also highly recommend Codecademy courses on HTML, CSS, JavaScript and Ruby.
If you are really serious about this stuff, which is great news, you might want to read more about making software. Start with the Pragmatic Programmer. It is a great book to read in your formative years.
And finally (this is important), try to solve a problem (like building a website for yourself or a friend etc) with programming. Learning just to know doesn't stick for long in my experience and probably is true for others.