I’m 22 and I want to start now

I’ve been interested in renting, owning, and selling properties. I have support from my family(in law) that are interested in starting as well. So finance is something I’m not too worried about at the moment as I work and have no money struggles as of now, I am married and my wife works as well. I want to start with something like a Duplex. But first, what do I need to even be able to rent out something to somebody. I’d assume I need a license to be able to. What should I research first I know there is plenty of post with this information but if anyone is willing to tell me directly that helps. The goal is having to not work a 9-5 with my youth still in tact. I guess I’m more looking for direct words of encouragement and small but helpful tips for someone looking into this area.