How to make load images full height first ?

You don’t need to make any changes to the image height. You can add the below to your themes functions.php file to apply the border to the image only:

add_action( 'amp_post_template_css', 'xyz_amp_my_additional_css_styles' );
function xyz_amp_my_additional_css_styles( $amp_template ) {
	// only CSS here please...
	?>
      .amp-wp-article-featured-image amp-img {
       box-shadow: 2px 2px 4px #888;
}
	<?php
}

You’ll find out more about adding CSS to the reader mode templates here.

Let me know if that works for you.

Nop it doesn’t work, I added in functions.php AMP and function.php of my childtheme.

I want my post images load as on module (Home page).

@acheetahpurr just to confirm: are you using the Newspaper theme on the site?

If so, they provide their own AMP templates via their mobile theme: https://tagdiv.com/amp-newspaper-theme/

It may be best to contact their support to modify the CSS of their AMP pages.