It's far easier to add images using a mobile phone as you can use the phone's camera to add the images to the product quickly. We would also suggest rotating your phone 90 degrees and taking all shots in landscape mode as this is the orientation of the images in the Eshop too.
Adding product options is a far quicker method of adding multiple types of products to a cart.
For example, you might want to have one product available in different sizes, weights, pack sizes or even colours. Also, fo each option you can individually configure the price, weight and even have a different picture.