Redesign my woo commerce storefront product page

Hi, I am currently setting up my woocomerce store and using the standard storefront theme from woocommere. I wrote some plugins which allow users on the product page to customize their product. The adaptions will be visible in the product picture which automatically updates. However, I have two issues: 1. Currently, the picture width is smaller than the description width. That should be vise versa, so that the picture is bigger. (Easy css fix, I guess) 2. I added my customization options after the short description. Therefore, the second column is now much much longer than the first column (which only includes the product picture). As a consequence, users cannot see the effects on the product picture when changing options below the fold. I have one idea how to fix that: make the left column fixed and only the right column scrollable until the end of the right column is reached - but I am also open for other proposals. I also have the requirement that the product page is has a nice UI from a mobile page. Please edit the woo commerce standard storefront product page design (+css if necessary) which I can then plug into my project. I don't need a plugin or child theme but can add the adaptions to my projects. The website is currently not online and cannot be viewed live as it is - Just imagine having a 10000 word short description for a product. To make sure you read the description until the end, please start your offer with the word banana. Please only apply if you have already worked on woo commerce projects and are familiar with the storefront theme. Please don't hesitate to ask questions if anything is not clear.