theworstofperth's dashboard

I saw typekit option in wordpress and tried to give it a try, but how do I make it work? i have no access to the full code or css in .com version of wordpress. It doesn't actually say how to implemement the fonts or how to use them. I get basic html access in a post, but no access to header or other code. I want to trial a better font for post titles and body text. I don't know why the option is there if I can't use it.
http://theworstofperth.com