Hello,
You can change the font with some custom CSS…to determine the selectors you’ll need, you can right click on the page, click “Inspect”, and then select the title (see screenshot). If you’re not too familiar with CSS, this article should help with changing the font.
You can add the CSS to the Custom CSS area under Appearance > Customize (if you have one) or to the style.css file in your child theme.
We are a bit limited in the amount of support that we can provide for customizations like this, but if you get stuck, please let me know! Please make sure to include a link to the page that you’re having issues with – I’ll be happy to take a look and see what I can recommend.