I got friends who scrap (I am just a fat lazy fan) and I believe that their is no licensing for amatuers.....that's why it doesn't go on your permanent fight record if you lose. However the best place I think to go would be here.
There you will find an MMA Fighter License Application (pro and amatuer) under the Membership tag on the top. Now this means you'll be a member of ISKA as an amatuer. ISKA puts on a ton of International MMA and Kickboxing events at the low levels.....they can also find you a ton of similar orgs for grappling style matches.Oh, and also Google you state's athletic commision and find a contact number or physical address....they will also be able to help you immensly. Good luck!!