You are asking for opinions, so take this for what it is worth. I wouldn't start with a flip. Unless you have previous experience and contractors who already love you things are going to take more time and money than you predict. Even with experience they usually do. You can easily end up going into the red, and that's not something you want to do on your first taste of real estate.
My first rental deal was a typical 25% down conventional bank loan. Yes, it tied up cash that I could now use more effectively. However, it got me in the game with a straightforward purchase that (sometimes not ideal) already had tenants in place. The tenants are good ones- keep the place well, pay on time, and mostly let me know if something breaks in a timely manner. I looked for months before I found this deal, so I recognized it was a good fit for me and was able to jump on it.
More than anything, I would recommend finding your local real estate investment group and talking to the people there. Find out what's going on in your market, that should help determine what strategies are going to work well for you when you start.