Analyzing the Market 39056

[Parker Staten Rish]

Hey guys, my name is Parker, and I am brand new to real estate investing.  I have spent years absorbing knowledge, and I still don't feel ready to purchase my first rental.  I have analyzed 10 deals a day, and have viewed every single house in the market with my zip code 39056.  I am having extreme difficulty figuring things out when analyzing the market.  In this zip code it is extremely common for a property on the same street let's say 3 bed 2 bath or 3 bed 1 bath to go for 140k while another house with the same specs and square feet will go for 200-300k.  Also, the prices for rent are equally as intriguing.  One home with the exact same specs on the same street will rent for 1k while the other rents for 800.  I think I may be overthinking things, but what do you guys think about the situation?  What advice would you give to someone looking to make their first deal in a market such as this.  My biggest fear is I will purchase a property and won't be able to rent it at 1k or 900 due to so much lower competition for the same specs in the same neighborhood.