Kicking Off HTML

So, I've started my HTML journey.
Mission: Achieve the HTML certification from W3Schools...Outlook: Eek!
Here are some catch phrases and vocabulary words I'm taking away from the first FIVE LESSONS of HTML Basics - www.w3schools.com:
* Hyper Text Markup Language: made up of markup tags and describes web pages (interprets the content of the page)
* HTML tags: keywords surrounded by angle brackets that come in pairs (start/opening tag, end/closing tag)
EXAMPLE (had to leave out the brackets because this blog's entry page is interpreting them...literally!):
html
body
h1 My First Heading /h1
p My first paragraph. /p
/body
/html

Text between html and /html describes the web page
Text between body and /body is the visible page content
Text between h1 and /h1 is the displayed heading
Text between p and /p is displayed as a paragraph

HEADINGS: represented by "h1" to "h6"
PARAGRAPHS: represented by "p"
LINKS: represented by "a"
IMAGES: represented by "img"

* You can save HTML files with either .htm or .html file extensions
* The content between the start and end tags is the HTML ELEMENT
- Some elements have empty content (empty elements are closed in the start tag)
- Most elements have ATTRIBUTES
- Most HTML elements can be nested (contain other HTML elements)
* Don't forget the end tag! Although most browsers will recognize it anyway...
* Lowercase isn't required for tags, but it is recommended, as future versions of HTML require it