You might try Bear Air, they carry most airbrush names and plenty of different models throughout the price range. I believe they will also send you a video on learning to airbrush, which will be useful to you. Picking one is a matter of preference, but since you have no experience with one, my recommendation would be a Paasche VL. It is a dual action brush which I have found relatively easy to use. A full kit runs around $60 from Bear, which is a decent price. Others on this board will have their favorites to recommend.
www.bearair.com
Good Luck in choosing one, you will enjoy the experience!