There has been a lot of great information shared here. I can only add that you may want to consider a single action airbrush to start. Dual action require a bit more finesse vs a single action, and has a stepper learning curve, being that you are controlling the amount of air and paint flow. Also to consider is a siphon feed vs gravity feed. Both have their place, as well as paint capacity of both. It's best to do some research and see what best fits your uses and situation. If in doubt, always ask away here, plenty of experience to go around that can help you fine tune the information to suit your needs. HTH