Help! I don't understand how bbpress works

So I have installed bbPress into my Website, but I don't quite understand how to set it up to make it look good and display the right stuff.

I did some reading, and most information told me to install a bbPress theme, but I'm pretty sure that won't work because I'm already using the theme suffusion, and the child theme suffu-scion. You can see the forum in my Nav menu that I added a forum and a few topics.

How do I add sections like: recent topics, best topics, etc etc