Adding digg buttons and similar ones in this manner?

At this website I’ve come across today I really like how they have their digg, email, comment, and the bookmark buttons arragned.

https://www.warcomeshome.org/content/mike-prysner

I want to do this on my blog at https://www.atriskstoriesofhope.com/wordpress and I’m not sure where to start. I know that somehow the buttons will need to have code in them that designates what post is being sent, bookmarked, dugg, etc. Anyone want to help steer me in the right direction?