Help – Archives and Categories View

Hi you all. I’ve used the hiperminimalist theme ( https://www.lamateporunyogur.com/hiperminimalistdemo/ ) to create a journal with my site layout. Well, I dont know anything about php and I’ve tried to arrange things as possible.
Now I would like to see something like “You are in Category XXX” or “You are browsing March 2005 archive” whenever I load those itens.
Confused?
Take a look at https://www.browserd.com/2005
You’ll understand.
Could someone give me an idea here?
Thanks