Hi, I'll second Snib's reference to Don's Airbrush Tips and Snib's own site, with about 45 years of airbrushing experience I happened upon them, and quickly learned much more than I had ever gained on my own. From those two I learned about all I know, regarding types, use, cleaning and general maintenance, all very important parts of airbrush use.
With that insight I was able to make decisions about what type, make and model would actually be right for me. While Iwata, H&S and several more make fine equipment for certain, my homework led me to three that suit my needs completely, at very modest cost. The Badger 100G double action permits as fine detail as I need, the 200NH and plain old 200 are my everyday go to brushes.
Over the years I've used Binks, Iwata and Paasche, most had their individual strong points but with some shortcomings, my most common dislike was increased difficulty in quick cleaning between colors and coats. The Badgers do a fine job for me, fitting my particular needs perfectly. They spray super well, simple and easy to use, cleanup is a cinch, reliability is their strong suit. Outstanding value.
If my needs required otherwise, than I'd not hesitate to try the newer Iwata, H&S or different other makes. There is no question about their spray quality, but for now what I mostly use is all I need, and at very low cost in comparison. For a beginner brush a single action would be a good choice, but the double action is not difficult to master quickly, just a bit more practice would take care of that and you'd be right on top of it.
Welcome back to the hobby, enjoy.
Patrick