I hear ya. I purchased a handgun at 18. I realize now that I probably didn't need it. But age (with age comes wisdom) and experience can't be handed out or given away. Advice yes but wisdom and experience no. I'm not selling to 18 yos because I don't like them, I am not selling to them because I think I know better than they do what they truly need because I have been there and done that already.
Also; Don't ever start smoking.
Come on man. I know I've been gone a while, but I'm thinking Uncle Sam gave you a pistol at 18 or was it an M16?