Forming a circle, or a magical study group, is perhaps a better first step. It can be on a relatively informal basis, and you and the other participants can get to know each other while learning about the Craft together (as a matter of fact, many covens are formed from study groups). The fun of this is that you can meet more people who are interested in what you're interested in, and you can all learn together, and maybe even develop a tradition from the results of your studies. (You can do this as a solitary, of course, but some people do take more enjoyment in working with others. Once again, do what's right for you.)
The steps for contacting people to form a coven are much the same as finding other pagans and Witches in your area. A word of advice, though: You may want to leave your last name off, or get a P.O. box. Don't give out your number (unless you have an answering machine). Advertising yourself as being interested in this sort of thing might attract, shall we say, undesirables. Try writing such a notice so that those who are probably interested in similar ideals will know what you're talking about without attracting the attention of people who aren't. Even though *we* know that we're perfectly ethical and legitimate, not everyone else does.