As Mark said you have to hang your license with a broker. I decided to just use my license and go out and make some additional money since I was already wholesaling. I recommend the live course because you will hear things mentioned and questions asked that are not in the online course. Also you get to network which may pay off later on. If you want access to the MLS you will need to join TAR or Tennessee Association of Realtors.
I have found out that having a license is a huge cost (somewhere between $1800 and $2000 depending where you go). But you can easily make it back depending on how active you are.
Once you become licensed you have 6 months to join a Broker or retire your license. In my mind there are only two types of brokers. The big name firms that have great training but suck the money off their agents in commission splits, desk, training fees and other misc fee's. And the mom and pop broker that don't really offer a lot of training don't charge you and pretty much let you do whatever. Guess which one I chose as a wholesaler.