[chrishajer]

You should spend some time looking through the bbPress plugin directory:

https://bbpress.org/plugins/

You can also search this forum for things like “adsense” and you will find people who’ve already done what you’re looking to do.

To add a new directory, called a “forum” in bbPress, you log in as keymaster (the admin user you set up at the beginning), click the Admin link, then select “Forums” from the admin panel. That’s where you add new forums. If you want them to act like directories, tick the box that says “Category” and it will become a container to hold other forums and won’t accept posts of its own.

Spend some time playing with the software.