Carrington Text Font Issue

I’m trying to change the font size and type on my blog (http://www.fictiveblog.com) and having a tough time. I’m not very familiar with CSS, but normally it’d be located in the CSS file. However I’m using Carrington Text theme which is a simple CMS theme. I’m not sure I even know what CMS is, but I’ve managed to adjust it to look more along the lines of what I’m looking for.

Can anyone help me locate where I can change the size and type of font for the basic entries and for the about blurb?

Thanks!