I bought a Aztek A470 when I was 14. Having said that I will say learning on a variable/double action was not easy, and I wrecked quite a few pricey models with the thing. This led to a lot of frustration. It was no fault of the airbrush, just a big learning curve that took my brain years to wrap itself around. You want fun from an airbrush, not frustration.
I will say the 470 is pretty easy to clean, its a durable unit that can be dropped and the Aztek sets have a lot of extras in the kits.
Recently I acquired a Badger 200G and a 200NT (Single action Internal Mix), which I think would be easier to learn airbrushing with, are reliable, very easy to clean, and they are easy on the pocketbook. They are older designs, but have been around for a long time. You can also get pretty good results with them as well, as I just finished a 1/72 Messerschmitt 110 in North African mottled camouflage.
As far as compressors, I use a diaphram compressor with a pressure regulator/moisture trap, and it can go 0-40 PSI. I will not understate the importance of the regulator unit. The cost of the compressor plus regulator cost me $240 back in 1998 and it's still running strong.