It depends what you are painting! If you’re looking at smaller models/tabletop minis, you should take a look at setups used in the minipainting communities. Larger models might benefit from different setups. I know I didn’t want to start cheap and have to upgrade later, so I jumped straight for the Iwata HP CS. The dual action is super nice to have (not a must have though). I’d also recommend spending more on a better compressor before a brush (I got a simple 1gal compressor from California Air Tools).

I have a cheap chinese TM80S RIBO aibrush + compressor kit. Works amazingly well for regular thinned down acrylic colors, but don’t ever try to put something more viscose like a primer through it, the pressure from the tiny motor is not strong enough.
That said, the kit was only like 50 euros on AliExpress, and will get you familiar with now to use an airbrush and how to take care of it. I also recommend buying an additional nozzle + needle, and don’t tighten the nozzle too much, I broke mine :D