That depends on what you sell on your site and how many visitors you can convert into buying customers. And lets assume that out of 100 visitors two visitors will buy your product. Not too bad for one listing in a search engine. And there is more. It is not only important to get listed, the key point is that your visitors will find you .
Chances are kind of low.
If you have lots of time you may go ahead and search for the information and you may eventually find it. If something does not seem to work, we will help you. But if you are then still not completely satisfied, you will get your money back.