I converted the poly shirt and shorts into nCloth leaving everything at default settings. I rendered after playing 40 frames. Shirt and shorts look smoother now. I could tweak to make the shirt look more natural but I'm going to focus more on modeling for now.

Tremendous thanks, gstr123, for stopping me from deleting the poly clothes. Now I know how to make nCloth (the basics). I also watched the free cloth tutorial. I think making the clothes in poly and then converting to nCloth will end up being my preference.