What to do after adding basic pathfinding?

I’m using LibGDX’s pathfinding which can be found here:

This is what I was able to get so far, but it all looks very mechanical, and not sure where to go from here. This is just basic A* pathfinding. How can I make it look more realistic? What do I do after adding the pathfinding? Also I do want to make it multiplayer so what are some things I also have to look out for when working on this? So basically what are things that I should look into?