Hi Alyssa,
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.
Thanks