The CRJ has lots of overnights in IND. Im not sure how often the ERJ flys there but I'm pretty sure it's not nearly as often if at all. There are lots of flights between ORD and IND but they seem to be very full all the time and you will have lots of competition for the jumpseat. Why not try Republic? If I was you I would highly consider NOT going to AE or get hired and build time for a year or so. I was there a year and the future is very grim.