Seperating content between menu pages

Theme: WooThemes Canvas
Website: http://www.SuBella.com

So heres the position I’m in. I want to create a site with a Homepage, About me, and 3 seperate blogs.

Currently I have all of the pages setup into one menu that makes up the Nav Bar. As far as I know, this is just fine and is not the problem.

The problem comes in when I want to have 3 separate blogging areas.
In the nav bar there is a section titled Courtney, Ashley, and Michelle. I need each of these to consist of their own content.
Now here it is… When I set the layout for those pages(Blog) All of the same posts are spread on all of those 3 “blogging” pages.

Which is understandable. BUT I need to be able to separate content.

I know we have some people lurking these forums who can do amazing things in WP but I just need the “For Dummies” version on exactly how I would go about separating the content on different blogs. I’ve tried separating by category, I’ve tried separating within the menu, I’ve tried many methods and I’m not sure if it’s my error or not.

Thank you guys so much