Fusion's still a pretty small community. Chances are good that any given tutorial's author can be found here, on Steakunderwater.com, or on Con-Fusion's Discord channel. Or any combination of the three. And I just can't help answering questions!
![;-) ;)](./images/smilies/icon_e_wink.gif)
If you want the particles to simply repel one another, then yes, pFlock is what you need. So long as you don't have too many because the forces will start to interact in unpredictable ways—some will just cancel out, while others will create over-strong forces that launch particles away at a very high velocity.
If you want to simulate something like a pool table or a pile of sand, you'll need a real physics solver like you'd find in Blender or Houdini.