How do you get to Carnegie Hall? Practice, practice practice.
How do you learn to airbrush? Practice, practice, practice.
Once you get paint consistency sorted out, then it is time to start looking at air pressure. Higher pressures tend to blow the paint out with less control and often resulting in spiders -- those splats with legs that spread out in all directions. While it may take a higher pressure to blow out thick paint, a lower pressure results in more control, finer lines, and the ability to add thin coats of paint in layers.
Lower pressure you can use thinner paint resulting in a more translucent coat.
Lower pressure & thin paint allow you to work closer to the subject, perhaps a half-inch or less. More control.
A gravity-fed airbrush can work at a lower pressure than a siphon-fed brush
Settle on your airbrush and preferred paint. Get a scrap model, some cardboard, or sheet plastic and start practicing. Draw thin lines. Make squiggles. Draw circles. shade them in. Practice, practice, practice. Only then attempt to paint your current masterpiece.
My home setup is a 2 gallon tank shop compressor with quick disconnects into a primary regulator set at 40 PSI, then to a final regulator at my working pressure - 8 to 12 PSI. Do not rely on the regulator on the compressor. I bought a 30 PSI gauge off of Amazon to get finer control of the final pressure. Did you know that gauges at the big box stores can be off as much as 10% full travel (that means your 200 PSI gauge can be off +/- 20 PSI). Out of the final regulator into the airbrush. I tweek the final regulator as needed for the painting conditions seen (temperature, humidity, paint mix). Currently using a Badger 360 Omni. That brush allows either gravity or siphon feed. I prefer gravity feed over siphon feed. My current paint favorite is Vallejo Model Air (acrylic), but I do ColorCoats (enamel) often.
With a tank compressor it makes noise while the tank fills, then shuts off and uses the stored air in the tank. Only a brief discomfort.
With a shop compressor I can disconnect it from the brush system and take it to the garage and air the tires or blow up an air mattress, or power an air nailer. The air flow is suffcient to use an air-powered die grinder handle. It is not a uni-tasker like a dedicated airbrush compressor.
Stay away from the small diaphram type compressors, especially the emergency tire inflators. Air pressure is catch-as-catch-can and the output pulses. A longer hose may mitigate the pulsing but you will still notice it in your work