I learned to program with a book called Learn to Program from the great publisher Pragmatic Programmers around 2011 All I knew was just like you: some HTML/CSS, and unziping and embedding jquery plugins. Here's a link to the book https://www.amazon.com/Learn-Program-Second-Facets-Ruby/dp/1...

I'd go for that and some JS on the side but if you got an iPad, I'd definitely try Swift with the Playgrounds app.