Check out Don's Airbrush site. He has a ton of information in relation to airbrush questions. I've learned a ton from his site. I'm not real savvy at adding a link to these forums yet; however, if you do a search for Don's Airbrush Tips online, it will take you to his site. There are also several others here who have links to his site.
I am in a similar situation as yourself, I returned to this hobby after being away for almost 15 years. I purchased my first airbrush/compressor combo off of Amazon for around $50. I recently just upgraded my compressor to one made by Master. Its nothing fancy but does everything I need just fine.
I am by no means an expert and no next to nothing about airbrushes in general, other than what I learned from Don's page. I would imagine that you could use just about any airbrush with your set-up, you will likely want to add a moisture trap, if you don't already have one on your system and a regulator that you can dial down the pressure.