Aaron, you are very smart to shop around for a good CFI. I don;t know your area in Indy, but suggest you phone or go online and see which if any CFIs are member of EAA, and especially a branch in your area like Warbirds or Vintage or Acro, etc.
Also go visit the area flight schools and FBO, walk up to the counter and see what kind of reception you get. Sometime it is not very good, the marketing and people skills of some of these places is lackadaisical and below par.
Find the students in the study area or restaurant and see who they like and most important who they don;t like.
There are some CFIs these days that really string student pilots along, and bleed your bank account dry. I read of one guy who had 32 hours and the CFI stiil had not had him solo.
I cannot say beyond any doubt that an older instructor is better or a younger one.
The older man may have flown many more types of planes and know about the real world of flying, the younger man may be more current on how to teach. You have to find one that communicates best with you, and who really cares if you become a good pilot.
You don't say what your longer term goals are or what area you are most interested in.
There are some expert pilots who do teach, you don't have to settle for average.
Good luck, and go get em and let us know how it goes.