Hello,
I saw the screenshot you attached.
1) Please edit the pages and enable the option to open categories menu.
Screenshot for Clarification: https://ibb.co/s6kXfrW
2) Basically the product images are controlled by woocommerce and our theme doesn’t influence this. WooCommerce Allows some settings that you can find under Appearance >> Customize >> WooCommerce >> Product Images.
You can try setting the main image width and the width should be less than the actual size of the images.
3) Sorry but there is no option in Theme Settings available for that.
4) You can try using the product categories element of the theme to display the categories in the page.
Screenshot for Clarification: https://ibb.co/xYywQhr
Regards.
Xtemos Studios