Hi,
The “Learn more” buttons are actually part of what we called content boxes.
For example, to customize the “Beautifully Simple” content box’s Learn more button. Please see screenshot. https://prntscr.com/70598g
Go to your WordPress admin, Appearance -> Theme Options -> Front Page Content Boxes
You will find the following, see screenshot.
https://prntscr.com/7056dr
Go to the Content Box ! Button textarea, and find the following codes.
<a class="read-more btn" href="#">Learn more</a>
Change the # sign to the url that you want the button to lead to. For example https://google.com
<a class="read-more btn" href="https://google.com">Learn more</a>
The button will link to google.
Remember to save your changes by clicking the Save All Changes button located at header or footer of Theme Options page.
To make the button link to google, but pop up on a new tab. You can add a target _blank to the code. For example, as follows.
<a class="read-more btn" target="_blank" href="https://google.com">Learn more</a>
And of course, you can always change the button text to other text, instead of “Learn more”.
Thanks!
Denzel