How do I make this loop show up, so I don't have to use templates?

Hello,

I used this tutorial to make a loop to show items from a specific taxonomy and it worked fine; as I needed it the way they wrote it – as items of a list I wrapped around it.

https://digwp.com/2010/01/custom-query-shortcode/

However, I need to create one more similar shortcode, that would show a bigger, more detailed loop, with excerpt and custom fields.

<div class="recent-release boxxie">
<p><strong><!---<a href="<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>">--><?php the_title(); ?><!---</a>--></strong>
<?php if ( has_post_thumbnail() )
   the_post_thumbnail( array( 80, 80 ), array( 'class' => 'alignleft') ); else { ?><?php } ?><br />
<strong>Released:</strong> <?php the_time('F j, Y') ?><br />
<strong>Release format:</strong> <?php $key="Release Format"; echo get_post_meta($post->ID, $key, true); ?><br />
<strong>Label:</strong> <?php $key="Record Label"; echo get_post_meta($post->ID, $key, true); ?></p>
<?php the_excerpt(__('Read on...','imseven')); ?>
</div><div class="clear">&nbsp;</div>

So, I was wondering how to write this properly, so I don’t crash my own website when I replace the output of the function with it. I understand that title and link to the item from the recentrelease custom post type need to be replaced, but how do I go about everything else?

I really don’t want to create a bunch of almost identical template files solely to output things with different taxonomies; a shortcode would be easier.

Many thanks. ??