UPDATE: a client confirmed this plugin works to change font  https://wordpress.org/plugins/easy-google-fonts/

In a child theme functions.php add the following code

add_action('wp_enqueue_scripts', 'wpestate_scripts_childtheme');
function wpestate_scripts_childtheme() {

$protocol = is_ssl() ? 'https' : 'http';

wp_enqueue_style( 'wpestate-railway', "$protocol://fonts.googleapis.com/css?family=Raleway:500,600,400,700,800&subset=latin,latin-ext" );


Now, you need to replace the raleway font in the above  example with your font(including in ‘wpestate-railway’ ). Open the google fonts page and click quick use for your font. You should have something like in the image below


Select the font styles from the list like bold, semi-bold etc. In “Add this code to your site ” section copy the string after  ?family= and replace it in the function above.