First Time Investing- Effects on DTI

[Thomas Pellegrino]

Hello everyone, 
I've been looking to get into real estate for years!! I finally have enough money and a decent job after finishing my masters. I am having one small hurdle I for some reason can't figure out mentally. So here is my plan of attack; I do not own a primary residence home yet, I still rent. However, I am looking into investing in section 8 real estate (that doesn't really matter), and I want to invest before I purchase a multi-family with an FHA. My question is, if I purchase homes using a regular bank loan under my own name, information, etc, will this hurt my debt to income when I apply for an FHA, or is it going to help me if I am cash flowing. I truly don't know why I can't wrap my head around that. They'd take my income, then the real estate income, and take 43% of that then subtract my debts. Sorry if this sounds stupid, but this question is holding me back from investing before I buy my first real home.