Adding Google font

Hello,

I’d like to add a google font but before I go wreck my website I’d like to get some advice.

WP beginner says to paste this in header.php:

<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Lora|Oswald" media="screen">
<link rel="stylesheet" type="text/css" href="YOUR THEME STYLESHEET" media="screen">

Which I guess is called “Theme Header” in PP themes, I am right?

In the last line of the code above it says “YOUR THEME STYLESHEET”, what should I put there?

Thank you