Depends what you like to do with an airbrush.
Do you want to paint illustrations, cars, motorcycles or do you want to paint models?
Where do you live? (for the availability of products)
what I mostly recommend to new airbrush artist, don't buy everything and the most expensive stuff.
For example its nice to buy a top model airbrush like the Iwata Custom micron sb-v2 (450 euro) for example, but you will break it and replacement parts are really expensive.
I started with an Harder and steenbeck evolution (80 euro) and it has very cheap replacement parts, and really easy to clean.
Most "beginners" airbrushes (brand doesn't matter) are easy to clean/maintain what is the most important feature of those brushes (in my opinion)
So for example the Iwata Neo or revolution are easy airbrushes, or the H&S evolution but don't expect the ultra fine details.
When you develop your skills, you will walk into the limitations of your beginners brush. And from there you will buy a high end brush like the micron. But when you reach that point you will know and have the skills/know-how to keep the airbrush clean and working.
Paint is a personal thing, I started with Wicked and Auto air from Createx, but I personally think the paints are to thick for my Iwata custom Micron.
So I switched to E'tac because its a easy to thin paint, and easy to use for illustration work (what I like to do)
Welcome to The airbrush club