I use an airbrush for my miniatures and it has changed the way I paint. Like any new method of painting, it takes time to get used to it and learn the new techniques. Watch nearly every video you can. I suggest a top feeder and keep the options very simple for your first airbrush. Play around often and as much as you can. The more you play around with it, the better you will get. Practice on paper until you are ready to try the real thing. Clean the brush between every color. It's fast and easy to do. Not doing it will do bad things to the brush and your pallet.
Heart of Glass was my secret identity.