How to ad a “read more” link to front page storys

Hi. I’m still new to this all but getting the hang of it everyday. The question I have now is how I can have a story cut off on the front page with a “read more” link after it so the reader can continue the article on a page where the whole article will be viewed. I cant find an option for this anywhere on the wordpress editing section. Thanks for the help on this amateur question. Hopefully I will be asking more sophisticated ones sooner.

-Brian

https://www.thepopsong.com (this is the website I want to do this to btw)