There aren't really any more resources other than basic tutorials such as the w3school ones. HTML is more of a "what you see is what you get" language than any other widely used language, so learning while coding shouldn't be too hard. Personally, I learned HTML using Microsoft FrontPage. I know, shame on me. But yes, my first few webpages were actually done in FrontPage, which is a program like Microsoft Word, what you see in the editor is pretty much exactly what will show up online. But increasingly more often when I couldn't get something to work using the normal editor, I'd switch to HTML mode and try to fix it in the code.
If you're looking for other tutorials, try tizag
. That website is my personal life saver.