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.