Actually been thinking of getting into it for awhile now. It has a bad rep amongst many with van art, martini & olive paintings and all but I want to learn it and use it more for painting sculptures and making mixed-media art in sketchbooks. I took a dirt cheap weekend intro workshop that's run by a local art store and learned enough to know the basic equipment, types of paints you can use and compressors. There was a hands on portion and I didn't find it that overly complicated to use but it's a messy process considering you have to re-load the paintcup, adjusting the spray as you go, tool maintenance, etc. I asked the instructor if he recommends special vents and he downplayed potential hazards (the mags make a big deal out of it he says). Which I agree with especially when you can just use non-toxic watercolors or dyes. If you plan to paint your car or a bunch of crash helmets with industrial grade paints and solvents, that's when you have to wear the gas mask and hazmat suit
I know what I need to get equipment-wise, it's just a matter of saving up the cash for it because I don't want to start cheap and buy plastic airbrushes and noisy compressors. On-line art stores might have descriptions for their airbrushes, like which one's best for which use (hobby, fine line control, big huge guns for cars, etc.).