FWIW, I've had a Paache airbrush for many years, and hadn't touched it for 30 years or more. I've recently jumped back into modelling and one of issues I had with airbrushing in the early years with enamel was the clean up. They required acetone/thinners and LOTS of clean up between color changes and after.
I have switched to acrylics, making it much easier to clean. I bought a compact little compressor on Amazon, and outfitted my airbrush hose with a QD, and found the Vallejo "Air" paints to be easy to use right out of the bottle. Depending on your brush/pressure setting, a good rule of thumb is paint should be the consistency of milk, (thin and flow easily). I have been using my .03 needle with my Paasche, and if I'm using a pain that's too thick, will add Vallejo thinner to get it to a thinner consistency. I practiced spraying, (after a terrible too thin mix ruined a prep'd body) so, practice with mixing in the paint cup. Too thick won't flow, too thin may run, though thinner mixes will flow better. I use a large bottle of "Airbrush Cleaner", but you can use water mixed with windex, and will run Iso Alcohol to clean between color changes. Start with lighter colors first, moving to darker colors and play with the settings. Keep a pad of paper near you to check your flow/spray pattern and practice. Also, there are TONS of videos out there to watch how to tune, adjust, clean and use your AB. Hope this helps.
This little compressor has more than enough pressure for AB, has a moisture drain and is (most importantly) quiet and small enough to fit right on my bench. It's also adjustable.
Meeden Airbrush Compressor