Aw, it takes some time and reading. I learned HTML out of a book, actually, when I was like thirteen? Here's some links I have bookmarked to help:

http://www.w3.org/MarkUp/Guide/ - this is the bible LOL.
http://www.webmonkey.com/ - lots of tutorials.
http://www.lissaexplains.com/ - really rec this, as it is like a dumbed down guide and those are my faves bc i hate a lot of jargon.