Hi,

Thank you for loving our theme.

1/ For change fonts, you can change the fonts for heading titles & body text via Customize > General Options > Font for Heading Title & Font for Body Text.

If you want to get more customization on different element, please use Elementor to config your homepage - as I know you're using Customize to config your homepage now. You can check this video tutorial to know how to config homepage by use Elementor.

2/ If you still use Customize to config the homepage, you can add more this code to Customize > Custom CSS to change color & font size for the date & description on boxed layout 1:

.grid-post-box-meta{ font-size: 15px; }
.grid-post-box-meta span, .grid-post-box-meta span a{ color: #ff0000; }
.penci-grid li .item p{ color: #ffff00; }

Change value 15 to value as you want.

Change color codes:  ff0000 and ffff00 on the above code to color codes as you want. You can get a color code here

Best Regards,

PenciDesign