'Fighting' captions (particles?)

Please be gentle- I'm an editor not a designer/animator. I do have access to, and operational knowledge of, AE & Fusion.

Brief (school project for my son) is to have two slogans 'fighting', with each trying to dominate the screen (stage backdrop for a dance performance)

Before I animate this, with dodgy keyframes & sketchy collisions & repulsion, is there anything that will help me out by giving the logos repulsive properties?

Many thanks for your fine help.