Changing Font Size

Hello. I have installed a custom font from MyFonts.com. It is a bit funkier text than normal and needs to be a bit bigger to read it. I used the Enfold Restaurant Demo as the basis for my site and was wanting to change the text size early on even before I added the new font. I found the body text in the base.css file and changed it, increasing the size of all the text in the body of my site. However, I would like to increase the size of the menu text in the header, as well as the socket in the footer, and a couple other places like the wording in the contact form.

Is there a way to change this text size globally, or individually for these sections? I am not too familiar with reading .css and customizing. However, if I know where to look, I can modify it.

Thanks in advance! The more I work with the theme, the more I like it :-) Very user friendly for amateurs like myself.

Jeremy