Your post doesn't really have a specific question in it so it's not clear what it is that you would like to know.
Are you looking for a real-life coven to join? If you are then perhaps the best place to look is on http://www.witchvox.net Other places to check to make connections with real-life covens might be through any local metaphysical store or at an open Pagan gathering in your area.
Are you asking what it's like being in a real-life coven?
Do you want to know what you might look for in a coven?
The questions can go on and on. Some clarification from you would be helpful.
Also, what sort of a coven are you asking about? Are you asking about a Wiccan coven? In that case are you asking about British Traditional Wicca, initiatory Wicca,eclectic Wicca, etc? Or are you more interested in traditional Witchcraft?
If you're after Ceremonial magic the term is more accurately not Coven but rather Lodge. In Druidry it is a Grove rather than a Coven. Again, clairity will bring you more useful answers.