This one's theoretically possible; I'm sure someone, somewhere, has been immediately successful. However, these cases are exceptional, and for most IM newbies, immediate success is like winning the lottery. For most of us, building an IM business can go on for weeks, months or even years before results are seen; but, in most cases, you can see some income almost instantly.
Advertising. You’ll need to get the word out about your sewing business, and one of the best places to start is with your friends and neighbors. Make sure they are all aware of your services and are willing to pass around your business cards. In addition, you should put up fliers in local fabric stores and get to know the employees so that if someone asks, they’ll be able to refer you. Any business needs a website, and yours will be no exception; you can put up a simple one that outlines what you do, and tells the reader what kinds of prices to expect. Finally, by joining organizations like the American Sewing Guild, you’ll be able to stay in touch with others who are doing the same thing as you.