Hi,
01. Log in to your WordPress dashboard and go to Products > All Products.
Click on the product you want to add a short description to.
In the product editor, scroll down to the “Product Short Description” section.
Add your short description in the text box provided.
Once you’re done, click on the “Update” button to save your changes.
02. You can change the font by means of the Advanced typography option, which allows you to choose the item from a drop-down or insert your custom CSS class. Please navigate to the Theme Settings > Typography > Advanced Typography.
Here is the documentation providing more detailed instructions: https://xtemos.com/docs/woodmart/advanced-typography-settings/
Screenshot for clarification:
https://ibb.co/xMDnXHw.
Best Regards.