I have one to add... I have talked to two "photographers" lately who were asking me questions. I always ask them "well, let me ask you a question, do you shoot in manual or auto?".... they don't immediately answer, followed by them looking down at their dial, followed by "well, I think".. I stop them right there. If you think you shoot in.... you don't shoot in manual.
that being said I try to be very nice and give them my card, then tell them when they learn to shoot in manual feel free to email me with those questions... the answers will make a lot more sense after you know what an aperture is