Pick a target area in which you would like to invest and become a student of that market. Know the properties, know how long they sit on the market, understand how long before there are price reductions. Look at both the for sale and for rent searches on the mls engines and use those to compare rental to sales prices. Look at the price history of properties for sale. Was the property last sold in 1998 or 2007? Did someone list it for rent at a high rate then give up and is now trying to sell? This history can tell a story about the motivations of the seller. Walk in on open houses for properties for sale and for rent. Listen to the feedback from others and chat with the agents. These conversations with agents about your goals can uncover pocket listings, listings where they know the buyer is distressed and willing to make a deal, upcoming probates, etc. I like to walk or ride my bike on the streets in the neighborhoods. It gives you a better feel of the micro communities and most desirable blocks and streets versus driving. Know where community amenities such as parks, ymcas, public transportation, etc are located. Understand the school districts. This level of diligence will help you feel comfortable when it is time to move forward and help you identify properties with the least risk.
Tenant screening will be important, but don't get ahead of yourself. One step at a time. Identify a community and a budget. Educate yourself on that neighborhood to identify the right deal. Have your financial and loan ducks in a row so you are prepared to move swiftly. During the escrow process, take that time to plan out your rehab timeline, budget, subs, etc. After that you can tackle the business of landlording, which is a whole separate animal in itself.