NFTs image

[msabau1]

Hello! I'm new to this course and have successfully minted two NFTs on Sepolia Testnet. I'm wondering if these NFTs have an image and how can I view them? I found them in my Metamask wallet in the NFTs section but I don't see them with an image just a blank square. Thank you for reading and I hope someone can answer me.
PS: I am also attaching the screenshot of the NFTs as they are displayed in my Metamask