Thanks for the feedback. I wanted to add this shipping plugin fyi: https://fr.wordpress.org/plugins/colissimo-delivery-integration/
But if you tell me that its hard to integrate it or i will need to contact a dev, i will wait.
Concerning product form customisaaion, reading subject on forum, i have understood, that i need to move product file into my website theme file. Then after, how to make changes? is there any plugins you can recommand me? I am not familiar with coding thats why i am working on CMS.
Thank you for your help