The Ethos demo shop uses 2 column shop layout that is why the columns are huge. You're using 3 column setup. Please change to two column setup.
This is not possible out of the box and will require custom development to achieve.
You placed your content in the short description area.
Place your content in the content area or the Woocommerce description tab. Ensure the description tab is enabled in Appearance > Theme Options > WooCommerce > Single Product