Trying to create this shortcode to get results from program_ids (can be multiple), then order the results by date, then group by series id if it has one, then limit number of results to whatever limit is specified.

northwoods_events.php

<?php

function northwoods_events_shortcode($atts) {

  $limit = 10;
  if ($atts['limit']) {
    $atts['limit'] = (int)$atts['limit'];
  }

  $args = array(
    'post_type'       => 'northwoods_events',
    'post_status'     => 'publish',
    'meta_query'      => array(
      array(
        'key' => 'program_id',
        'value' => explode(',',$atts['program_id']),
        'compare' => 'IN'
      ),
      array(
        'key' => 'event_datetime',
        'value' => date('Y-m-d H:i:s'),
        'compare' => '>'
      )
    ),
    'meta_key'        => 'event_datetime', // 2019-11-01T16:00:00
    'meta_type'       => 'DATETIME',
    'orderby'         => 'meta_value_datetime',
    'order'           => 'ASC',
    'posts_per_page'  => $limit,
  );
     /*
     // GROUP BY
    'meta_key'         => 'series_id'
    */

   #var_dump($args);die();

   $events = new WP_Query( $args );
   if( $events->have_posts() ) :
     while ( $events->have_posts() ) : $events->the_post(); ?>
     <?php
        $event_date = get_post_meta( get_the_ID(),'event_datetime' );
        $event_date_create = date_create($event_date[0]);
        $event_id = implode(get_post_meta( get_the_ID(),'event_id'));
        $event_location = implode(get_post_meta( get_the_ID(),'event_location'));
        $event_url = "https://my.northwoods.church/portal/event_detail.aspx?id=".$event_id;
        $event_image = implode(get_post_meta( get_the_ID(),'event_image'));
     ?>
     <hr>
     <div class="row">
       <div class="col-lg-3">
          <a href="<?php echo $event_url;?>">
            <img width="285" height="148" src="<?php echo $event_image;?>" class="attachment-full size-full wp-post-image" alt="" srcset="<?php echo $event_image;?> 285w, <?php echo $event_image;?> 160w" sizes="(max-width: 285px) 100vw, 285px">
          </a>
       </div>
       <div class="col-lg-9">
          <a href="<?php echo $event_url;?>">
            <h1><?php the_title(); ?></h1>
          </a>
         <p><?php echo date_format($event_date_create,'F j, Y');?> | <?php echo date_format($event_date_create,'g:ia');?> | <?php if ($event_location) { ?><?php echo $event_location;?><?php } ?></p>
         <?php the_excerpt(); ?>
       </div>
     </div><!--end row -->
     <?php endwhile;
   endif;
}
add_shortcode( 'northwoods_events', 'northwoods_events_shortcode' );