How do I begin investing in real estate?

[Nick Longstreet]

I've been listening/reading on BiggerPockets for a while now, as well as a few books on real estate investing. I really want to get into this and make it a full-time career someday. The issue that I'm running into is that I have no money to start. All of the information (at least that I've seen) in regards to starting with "no money down" talks about finding someone you know to lend you the money. My issue is that I don't know anyone who would invest that much money into someone who "doesn't know what they're doing" in their eyes. I have no experience or track record to make them think that investing in me would be a good idea. Which leaves me stumped as to how to begin. Any advice would be much appreciated!