how to make the "$first_post" query work on the second loop

I have this custom sub category page with six loops in it for styling purposes.
The second and the fifth loops has two columns in a section with the first column has a bigger sized featured image and no excerpt and the second with a smaller featured image with excerpt diplayed.
I used to $first_post query to achive the result which works on the main category page where is have one loop for each category. Can’t get it work here, I understand it’s not the first post but tried to change current_post number but still not working.
Can anyone help me with this please.

Here is my code for the second loop:

<?php rewind_posts();
                        $my_query = new WP_Query( array( 'category_name' => 'il belpaese', 'posts_per_page' => 2, 'post__not_in' => $do_not_duplicate ) );
                        ?>
                    <section class="category-box clear">
                        <div class="bg-wrapper clear">
                        <?php
                        while ( $my_query->have_posts() ) : $my_query->the_post();
                        $do_not_duplicate[] = $post->ID; ?>

                        <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
                            <section class="sub-cat-post medium-left clear">

                                <?php $first_post = $wp_query->current_post == 2 && !is_paged() && is_archive(); ?>

                                    <?php if ( $first_post == true ) { ?>
                                        <figure class="featured-image medium-img">
                                            <a href="<?php echo esc_url( get_permalink() ); ?>" rel="bookmark">
                                                    <?php the_post_thumbnail( 'category-medium' ); ?>
                                            </a>
                                        </figure>

                                        <div class="entry-title-wrapper">
                                            <h3 class="entry-title">
                                                <a href="<?php the_permalink(); ?>" rel="bookmark">
                                                  <?php the_title(); ?>
                                                </a>
                                            </h3>
                                            <?php if (function_exists( 'button_excerpt_more' ) ) {
                                                echo '<span class="button-more">' . button_excerpt_more() . '</span>';
                                            } ?>
                                        </div>

                                    <?php } else { ?>
                                        <figure class="featured-image">
                                            <a href="<?php echo esc_url( get_permalink() ); ?>" rel="bookmark">
                                                    <?php the_post_thumbnail( 'category-small' ); ?>
                                            </a>
                                        </figure>

                                        <h3 class="entry-title">
                                            <a href="<?php the_permalink(); ?>" rel="bookmark">
                                              <?php the_title(); ?>
                                            </a>
                                            <?php if (function_exists( '_button_excerpt_more' ) ) {
                                                echo '<span class="button-more">' . button_excerpt_more() . '</span>';
                                            } ?>
                                        </h3>

                                        <?php
                                        if ( has_excerpt( $post->ID ) ) {
                                            echo '<div class="deck">';
                                            echo '<p>' . excerpt(35) . '</p>';
                                            echo '</div><!-- .deck -->';
                                        }
                                        ?>

                                    <?php }
                                    ?>

                            </section>
                        </article><!-- #post-## -->

                        <?php
                        endwhile;
                        ?>
                        </div>
                    </section>