If you are over 18yrs old...consider coming out to one of these:
They'll be suitable for guys who are new to airsoft. It's more geared around playing...but you'll get to see all types of stuff and be able to ask any/all questions you might have in person.
I wrote this earlier today...sorry, doesn't answer your specific question...but there might be something helpful in there as you look into airsoft.
If you're in public view...I'd highly recommend against shooting anything. All it'll take is one pissed off neighbour and the cops will be at your door. Legal or not...it's going to be headaches you don't want.