Insert a text caption left aligned to as-is image (URL in post)

Site URL: https://www.orchardroomnyc.com/

Hello community! 

I cannot seem to come up with a solution for this. 

I simply want to place a left-aligned image caption with a hyperlink attributing credit to the said image, is there anyway I can do achieve this with my current design: https://www.orchardroomnyc.com/ 

Thank you! 

Hi. Which image you want to add this?