Hi Flavel,
If I were you, I'd run over to my local book store...Any book written as an intro to HTML/XHTML will do. While you're at it, you might want to get a book for CSS as well as CSS (cascading style sheets) can be easily integrated into your html documents to easily format your pages.
If you're lucky, you can find some books that cover html, xhtml and CSS in one book.
After a quick search online, I came across one book that does such a thing as combining all three:
http://www.amazon.com/HTML-visual-bl...0337192&sr=8-6
I'm sure there are others I just don't recall the book titles nor the authors off the top of my head. Hope this helps.