Shop page is the Woocommerce functional page that is destined to show the products, it is not editable.
3. Please provide the screen.
4 and 7 Please provide the screen on how you want to customize it.
If you want the shop page to show the categories only, you can configure that in the Appearance > Customize > Woocommerce > Product catalog view, you will find the option for the sho page view and for the catalog view.
9. and 10 please contact your host support on this issue