Hello,
We don’t speak Spanish, so would you be so kind to reply in English?
Do you want to disable sidebar on the single product? Go to Theme Options > WooCommerce > Single product > disable sidebar.
To edit the product description tab go to WPBakery > Role manager > enable page builder for the products https://prnt.sc/zwgtzm Then you’ll be able to use page builder to edit long product description.
Regards