It is definitely possible to get orders if you are just getting started. In fact, I don't think it's a good idea to spend money advertising a gig with no reviews. You should get some good organic success so you have some good reviews before you even consider advertising.
If your gig is optimized with high-quality images, samples of work, and a strong description, then it is only a matter of time before someone finds you. You may just need to wait several weeks to a month, and then once you get your first order, the amount of orders coming in should steadily increase from there.