Supplies Airbrushing...where do I start?

Nicolle’s dream on YouTube has a series about airbrushing and even how to make your own sealant for airbrush. I would look around on her channel

 

I've been wanting to try air brushing, too! I've become quite good at using dyes to color my dolls and doing face ups with pastel chalk a and sealant. Thanks for the link!

 

First, take this link: /threads/paint-for-airbrush.856315/#post-13033284
I had written up some stuff re: paints over there. You can also use things like watercolor or gouache, as long as it can be thinned into a pigmented liquid you can mostly likely blast it through an airbrush

Now for the rest, what to use and buy partly depends on your preferred style and partly on what you plan to do with it.
Like with airbrush guns, there are several ways of working (single vs double action, paint feed styles etc.).
This website explains it quite well: Types of Airbrushes. things to know when buying first airbrush:
Personally, I have a double action one with gravity feed (to be precise, a Harder & Steenbeck Infinity CRplus), since from reading it felt like a good choice and it's a local company. Iwata is a popular choice too!

Now the other big thing is the compressor. The ones for nail art are usually waaaay too weak, since they are not really made for high pressure or long painting sessions. You will constantly struggle with the machine losing pressure or getting too hot, and switching off. I personally have a Sparmax AC-500, but I have to admit I mostly have it because another BJD person had recommended it to me, it's without oil, from a local company and it was advertised as somewhat "quiet". It's still not really quiet, but I guess the others are even worse
Here are its stats so you can find something comparable in size: tank size 2,5 l, 23-25 l/min, 4 bar, 54 dB loud, no oil.

On top of that you will need a couple other small things, but the gun and compressor are the most important. Rest is for comfort/depends on your working style.
It is useful though to have more than one needle size at hand. Very small needles are better for details/small areas, bigger needles for covering or sealing bigger areas.