This is a complex question, and depends on your overall goals. If you're mainly a buy and hold investor, buying in the suburbs is usually a good strategy. If you're a flipper, buying in a changing area will be higher risk, but higher reward. Additionally, it is important to understand the different neighborhoods in Indianapolis since it can vary block by block. Check out this POST on biggerpockets and interactive MAP from Sterling White.
CIREIA (Central Indiana Real Estate Investors Association, https://cireia.club/), INREIA (Indianapolis Real Estate Investment Association, http://myinreia.com/), The Simple Wholesaling Meetup (https://simplewholesaling.com/). Many of these are also found on www.meetup.com
StolCo Designs - stolcodesigns.com, (Ask for Patrick)
Fair and Square Home and Landscape, fairandsquarehomelandscape.com, (Ask for Josh)
Jaspreet Baveja - https://jgbllcre.com/
Compass Property Management - www.compass-property.com, Darshan Soni
Stacey Patlan - (765)-969-6066
In Alphabetical Order: Eagle Land Title, Hocker & Associates, Monument Title, Victory Title