G&B has given you some great info.
Sign up at the Maryland AR15 Shooter Site (link provided above)
We've got links for gun shops, I can give you an FFL if you want to buy the LEGP (great gun). In fact, the FFL will hold the gun for you.
Once you get in state, let us know and we'll get out to the range.
A good outdoor range is the AGC Marriotsville range. For my club, see [url]www.monumental.org[/url]