note that with the NG, you are far more likely to get called up for action. depending on your "real life" this can be good or bad. if you end up getting "laid off" (as opposed to fired) from your day job because you'r ealways gone, that's not cool. look in the gov't section of the local phone book, call up the closest NG unit, and ask them if you can stop by and ask them real questions.
some thoughts:
there are "permanant" reservists that man the unit full time. these may not be the best peopel to ask. try to go to a unit and ask when the next reserve drill weekend is for the NG unit there and ask if you can attend. i know the army reserve unit i was at would welcome a guest attendance from a motivated civillian. also, the same physical buildings at a "unit" may be shared by multiple entities: Army reserve, NG, or other branches. there are 4 weekends a month...
good luck,
chris