Niagara - Orient Mesh and avoid overlap

Development Asset Creation
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1

Hello and thank you for your time already.

I’m a beginner in Niagara and I want to achieve something that must be simple probably.
I would like to orient all my meshes to the center of the niagara system. But I really can’t find a way, I’ve tested changing the orientation of the mesh in particle spawn, adding some forces and others. Can’t get the result that I want.
This is what I’ve so far :

image
image1299×631 106 KB

And this is the result that I want :
image

So my 2 questions are :

  1. How to orient my mesh so they all face the center of my system ?
  2. How to avoid my meshes to overlap with each other and like in my drawing ?

Thanks you in advance !