Welcome to Snapzu ImNotASchizo!
Here's a quick video on how to find tribes using the search feature. Each snap also has a list of tribe's it's been posted to on the right side which should help you find other related communities. See that in action here.
There are a lot of features you'll discover as you start using this site. You can check out this great post about the The 10 most awesome features on Snapzu which will give you a quick rundown of some interesting features. For more info, check out the links in the footer of the site and the stickies in the /t/lounge.
Enjoy your stay and feel free to ask questions here or at /t/asksnapzu.