@Davis Doan
Rentometer: As a starting point for doing research in Indy but also other areas is rentometer or hotpads/Zillow rentals. As you practice and analyze deals, get an idea on what the rent ranges are like in the class A/B/C/D.
Trulia: The crime map on Trulia is also a handy reference but not always the most accurate since there are a couple blocks that are class B adjacent to some solid C/Ds. I take it with a grain of salt.
Airbnb: Another fun way I've also tried are scouting the city on Airbnb. Class A/B areas are the more popular places for Airbnb's and their prices should reflect that.
Google map: The street views quickly get outdated so don't rely on those entirely, but getting an idea on what businesses are around and the quality of schools in the area is helpful.
For Indy in particular, it can be tricky to find a turnkey ready 3br 2Ba and still cash flow significantly (though I think there are still plenty of areas where a BRRRR would work nicely). Areas outside of Indy 465 loop like Beech Grove/Franklin township/Greenwood, etc. can be a safer bet and often still have a good amount of 3B2Ba. Within Indy city proper, I've found 3b 1ba more popular of a layout. I would suggest not limiting your search with the 2ba.
At the end of the day, you'll probably need a local kickass realtor to give you the real lowdown once you've narrowed down your target cities.