Add new inner sidebar for 3 column template

I am customizing this wordpress theme https://demo.bright-theme.com/presto/ and I want it to have a similar 3 column homepage look as https://www.marieclaire.com/.

The theme uses the same sidebar for all the pages and its not working with the custom image title, as it also appears on all pages. I want to add a second sidebar that only appears on all other pages except homepage. I need your help writing the code.

Here is the sidebar code:——————————————–

</div><!-- .primary-content-wrap -->
			</div><!-- .primary-content -->

			<div class="primary-sidebar">
			<?php if( is_active_sidebar( 'sidebar-primary' ) ): ?>
				<?php dynamic_sidebar( 'sidebar-primary' ); ?>
			<?php endif; ?>
			</div>

			<?php
			$layout = get_theme_options_data( 'presto_website_layout' );
			if( ($layout != "layout-2") && ($layout != "layout-1") ):
			?>
				<div class="secondary-sidebar">
				<?php if( is_active_sidebar( 'sidebar-secondary' ) ): ?>
					<?php dynamic_sidebar( 'sidebar-secondary' ); ?>
				<?php endif; ?>
				</div>
			<?php endif; ?>

		</div><!-- .site-main-wrap -->
	</div>
</div><!-- .site-main -->

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