Hi Mel, thank you for contacting us!
I am sorry to hear that the unused widget areas on your WooCommerce page are throwing your alignments off and we will do our best to help you get it working.
The product catalog page created by WooCommerce are treated like Blog pages and should use the same theme configuration settings that would work for them. One thing you can try is following the instructions in this guide from our support center to remove the sidebar from blog pages to see if that hides the blank widget areas.
The Read More button under all of your products is added by WooCommerce itself and there are no theme controls that allow you to change that text. However I was able to find a support post in another forum that provided a function you could use to make that change:
add_filter( 'woocommerce_product_add_to_cart_text', function( $text ) {
if ( 'Read more' == $text ) {
$text = __( 'Order Now', 'woocommerce' );
}
return $text;
} );
I recommend using the Code Snippets plugin to add that functionality to your website. I hope these steps help you achieve the design you need and please let us know if there is anything else that we can do to assist you.