Hi there! You can use the following code to your custom CSS:

#sp-header .logo a {
    font-family: cursive;
}

You can use your desired font within the above code!

Note: Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code. https://prnt.sc/pu705g

https://prnt.sc/pu70zn

Best Regards