Adding widgets to each blog

Hello,

Ok, so I have the “main blog” that shows all the topics I’ve written about and it shows the widgets…

How do I create widgets on the right side of every single blog instead of just where the “main blog” is?

The site is https://www.mycontractoronline.com/blog/

And if you click on “moving to a new house” I can get the 3 buttons that say:

“find a contractor for your home project”
“contractors sign up here”
“get a quote to build a website”

To show up at the bottom of the blog but not on the right side of the blog..