Please create a new user interface for the back end of the website pages.
It is very difficult and the learning curve is very high. This back end user interface could be made much more simpler and stream lined. Look into different websites, such as Shopify, Big Commerce or SquareSpace. Developing sites on those platforms is so much more user friendly and easier.
This is one reason why I am using SquareSpace to host my website and have a link directing people to design there shirts on DecoNetwork. The cost of having someone develop a site on SquareSpace was 3x as cheap becasue of the learning curve and confusing placement of things aroud the site.