I would be happy to help. It sounds like you're using the Minimal theme from the Theme Store. Here are some of our image tips for the best images you can add to your product pages from our help docs: Tips for Minimal.
Are you looking to place photos on your product page or on a different area of your theme? What happened when you tried to place an image on your store?
Let me know and I will provide you with resources and guidance to steer you in the right direction.