Congrats! I've only been at it a couple months and remember the thrill when I found my first silvers. All in my own yard, two mercs and a quarter, and sat night I found an arrowhead. I'm obsessive about this sort of stuff, just jumped to MD'ing from a very expensive RC car hobby this summer and must say I think this one will last with me.
I've even started coin roll hunting at the post office I work at, much to the annoyance of my fellow window clerks.
Have fun!