Getting my foot in the door for Multifamily housing

[Treven Jennice]

I am extremely new to all this and the site, i would however like to start learning more and eventually invest in a duplex, or at most 4 plex, not sure on wording yet, and i would probably end up living in one of the parts and rent the others. 

What are some good books or guides to read on, and information should i familiarize myself with as of now, like legal documents and standings.

The location i am looking to start out in is Ohio, the columbus area or around there, since this is where i will be living after i get out of the military.

Thanks for any information and help.