Custom fields and excerpts

Dear experts,

Do you know how can I add custom fields to the post excerpts? I created a custom post type named places and wanted to add two custom fields named first_name and address. I would like to add to the excerpt those two custom fields instead of the usual short paragraph.
The way I am pulling my custom post type is as follows:

<?php
/*
 * Template Name: Places to go
 */



// Replace the loop.
remove_action(  'genesis_loop',   'genesis_do_loop' );
add_action( 'genesis_loop',   'places_custom_loop' );

genesis();

function places_custom_loop() {
 
            echo '<h1 class="entry-title">' . get_the_title() . '</h1>';
            the_content();
            //WP Query Start
            $per_page = 3;
            $places_args = array(
                'post_type' => 'places',
                'posts_per_page' => $per_page,
                                'paged' => get_query_var( 'paged' )
            );
            $places = genesis_custom_loop( $places_args );
}
 ?>

In the Advance Custom Fields plugin docs says that I have to echo out the custom fields like this : <?php the_field('first_name') ?>; But honestly I have no idea how to use it in the code above.

Could someone please help me?

Thanks,

Janeth