@Luis Martell - if you are looking for a website, I heard that Biggerpockets.com has a lot of good and free information ;)
Unfortunately, even if you manage to get a $0 down offer accepted, you would still need cash for the inspection, appraisal, LLC, insurance, etc. that take place before you close the deal. So really, closing a deal without spending a single dollar is far from realistic (unless you can get the owner to finance EVERYTHING, which is again unrealistic).
And I would not recommend you spend money on classes taught by these gurus. There are plenty of successful people out there who are self-taught. The best thing you can do right now is to save as much money as you can and learn as much as possible. Free information can be found here, on the podcasts here as well as others like Spotify; you just need to spend a little bit of time to look. I would also see if there is a local REIA club nearby. Most likely you would need to pay for a membership, but it would be the best investment you can make as you get to interact with experienced investors in every aspect of RE.
Good luck!