You can choose one of the professionally designed font combinations for use across your website. Here's how you can change the fonts on your page
1. Navigate to the Website menu and choose Design from the drop-down menu:
2. In the Design menu, navigate to the Fonts tab.
3. Choose the font combination from the list.
5. Instantly preview how your website will look with the selected font combination. Once you are happy with the font combination, click Save. The new fonts will be updated across your entire website, including headings. The block design will be updated automatically.
7. Click Publish to make the changes live.
You can learn the steps to font customization in more detail from this tutorial.