I want to get ready for HTML 5 and start playing around with it. Do I need to install it or something before using it? How does it work? I'm currently on shared hosting.
HTML5 isn't a server-side technology. All you need to get started is a browser that supports HTML5.
See these pages for HTML5 support in different layout engines:
http://wiki.whatwg.org/wiki/Implementations_in_Web_browsers http://en.wikipedia.org/wiki/Comparison_of_layout_engines_(HTML5)
You don't need to install anything. Just a texteditor and a webserver is enough. You only need to hope that the webpage visitors uses a webbrowser which supports HTML5 fully. Right now, there aren't many of them out.
No like all HTML it has nothing to do with hosting (unlike php etc). Just create your own page with HTML5 elements and upload it to your hosting. Then you can view the page in you browser (if the browser supports HTML5 ofcourse)
You don't "install" HTML5 - did you install XHTML 1.1, or HTML 4.x? (no is the answer I'm looking for). Certain browsers support HTML 5 and some don't.
HTML 5 Browser Support/Engines: Comparison of layout engines (HTML5)
<!DOCTYPE html>
is the doctype of HTML 5, add it on the top of your document.
Even if you didn't add the doctype, HTML 5 tags still work (if supported).
Oh - AND since I'm knew to Stack Overflow, here's my "second link", since it thought I was trying to spam...
HTML 5 Working Draft:HTML 5 Working Draft