That’s fine. Glad you are trying to learn. Hope i can help here.
1. You have mentioned shop page here. Are you using WooCommerce plugin ? If so, please select post type as Product. You may check this video as well it is specific to WooCommerce. https://www.youtube.com/watch?v=L_Bvo2CF_tw
2. Regarding photos, you need to use featured image for your post or for products. You may search youtube video to set Featured image in Post or WooCommerce products.