You may want to read this How-To on Starting a Linux Users Group:
There were other references can find with Google. You may want to locate the nearest LUG to you anyway, as they may be able to give you some information to get started or tips on getting started.
Probably be prepared to keep you sleeves rolled up and your hands in the workings for the duration of the group. It will only be as successful as the work you put into it.