Adding a New Font Problem

If you’ve added your font file on your child theme folder then you can add something like this on your child-theme’s style.css

@font-face {
   font-family: MyCustomFont;
   src: url('MyCustomFont.ttf');
}

https://codex.www.ads-software.com/Playing_With_Fonts#Font_Face

2. It seems that by default, title of widgets use “Roboto Condensed” font. I want to change this font. How can i do this?

.widget-title {font-family: MyCustomFont;}

On one of your previous threads I asked if you use Firebug. You said yes. General CSS edits like this should be no problem if you do use web dev tools like Firebug. Maybe you could learn from this post https://ronangelo.com/use-firebug-to-modify-wordpress-theme-css/

Thanks a lot for your help and that helpful link.