Hello,
Sorry for the delay in answering.
Yes, I’ve checked your site.
1/ We recommend using images of the same size for products.
Mentioned “Stretch Product Image” option can be disabled via Theme options > WooCommerce > Shop > Products style, then you can activate a default WooCommerce theme – Storefront and check images. You will see images will be displayed in the same way independent of the theme.
Here you can find info about how to activate Crop for images – https://xstore.helpscoutdocs.com/article/89-product-images , it comes from WooCommerce settings (do not forget to re-generate thumbnails after making changes).
2/ About font-family, demo – https://prnt.sc/hV3I-RZLrofq and your site – https://prnt.sc/BP9kTzYqHCVj , so it is not the same. Also, there is an error with the font your selected – https://prnt.sc/OJypU-63inb8 , to solve it – connect to your server using FTP and remove all folders inside wp-content/fonts/ folder. After that go to Theme Options > choose necessary fonts and save settings.
Regards