This is why several of us were recommending Tamiya's "Rattle cans" (spray paint). They have such a wonderful nozzle design that you can get an airbrush finish straight from the can.
If you do want to get an airbrush - keep in mind that it's going to be an airbrush 'system', not just an airbrush. You'll need the airbrush, plus a compressor, filter, moisture trap, possibly a regulator etc... This adds up very quickly.
Since you are just getting started with modeling, I'm going to guess that you've never used an airbrush before and there is most definitely a learning curve, in addition to the cost.
Anywho...
Badger airbrushes have been around for decades and some are decent, some are actually quite good and some are crap for model work.
Paasche has also been around forever and are generally better than Badger (though it varies by model/age etc.).
Tamiya has it's own line of airbrushes as well, and I have never used one so...?
Iwata has quite a reputation for it's airbrushes but, they aren't cheap.
Whether you use a Tamiya spray can or an airbrush, keep in mind that you do NOT linger on the model to get more paint on in one coat. You move across the kit starting -before- the leading edge of the model, start spraying just as you reach the model and keep spraying while moving at a modest speed across the surface to the other end and then stop spraying. Multiple light coats get a better overall effect than one overly heavy coat of paint.
In most cases, you want to hold the can or airbrush about a foot or so from the model while spraying, not too far, not too close. You may want to grab a piece of the empty sprue from the kit and run a few practice passes on it before actually painting the model, just to get the hang of it.
There are MANY videos on Youtube (and probably elsewhere) that can give you a good head start on the hows and whys: