There is nothing wrong with allowing it to become visible before announcing it to the world. Or perhaps a private beta for a few weeks may give the opportunity

There is nothing wrong with allowing it to become visible before announcing it to the world. Or perhaps a private beta for a few weeks may give the opportunity to fix some things before being crushed by a thousand visitors all at once. All of which is to say, you can make it visible now, to a small population, in preparation for more to come.