Parent Category

Hello,

I’m super new to wordpress, so please bear with me. I did try searching and couldn’t seem to figure out my answer as most of what I was reading was over my head.

I basically want a category that says ‘Blog’ and then when you mouse over that, it displays all my different category’s. Just trying to clean up things and not have my navigation clogged with categorys. I created a new category called Blog, which isn’t showing up. I then went and told my other category’s that ‘Blog’ was the parent. This didn’t work as intended, and my other category’s still show up in the navigation menu.

Am I doing this right? I would assume not. Is there something simple I’m not doing?

Thank you so much for the help!