I say start a group. You will position yourself as an expert, in the long run. I learned about half of what I know about real estate from working in the field and half from listening to others who have spent years or decades investing.
Here in California there is no shortage of participants, but it isn't about how many people show up.
As far as getting a real estate license, you don't need one. Yes it would give you access to certain useful tools, like the full MLS, but imho, investing and being a Realtor are not remotely related, aside from sharing an industry.
Along with the DMM, you might try "driving for dollars", or touring your local area and looking for run down or vacant homes. Just knock on the door, talk to neighbors, get a lay of the land. Eventually you will find a motivated seller or vacant home with an absentee owner that might be more than willing to get rid of it. The DMM letters sent to a vacant home without mail forwarding don't do much good :/
Are there trustee sale auctions in your county you can attend? What about tax lien sales?
Also, this might seem like a silly question, but is your Realtor sending you leads on homes that have been on the market 120-180+ days? Because they do exist and they often have a myriad of problems, or challenges, depending on the type of person you are :)
Lastly, consider sending letters to all the Realtors in your area letting them know you'd love to get a home that needs work for a flip. You can still use your Realtor as a buying agent, so they don't feel slighted (although unless you signed an exclusive representation agreement, you can typically work with whomever you want)