Posts to appear under blog

Hi!
I have posted for help before but no luck with replies :(.
I would like it for my posts that are put into categories to appear under my blog heading/menu. Under the heading Blog I have categories or sub pages body, mind, inspiration. These are the names of my categories. I would like to know, how do I get the posts saved in each category to appear under each page?
for eg https://www.pathtowellness.com.au You hover on blog, and a drop down menu appears with names like mind, love etc ( I have this already ) and if you click on mind for e.g., all posts that were saved into the mind category appear here.

Does that make sense? I am not looking on how to create pages with sub headings, but how to get my posts into each sub page or whatever it is called.

I struggle with technology so please give me answers in kids language. Many thanks and I am most grateful!
x