Usually, yes - especially if the coven has more than two people. The leaders are usually the most experienced in the Wiccan coven. Depending on their gender, they are called the High Priest or the High Priestess.
Judy Harrow has written: 'Wicca Covens' -- subject(s): Covens, Witchcraft
Unfortunately not all covens are online and very few covens actively advertise for new members. A quick look at Wiccan Meetups, showed nothing for Belfast, however there is an Irish Pagan Federation who would be the best people to aid you:
Anyone, of any age, can be a Wiccan. However, certain covens may have age limits for joining.
In Wicca there are high priests and priestesses which are always open to helping new coven members learn their way around their spirituality. Fellow Wiccans are also usually open to helping people learn more about the religion. High Priests and Priestesses are usually the leaders of covens. Sometimes you can find Wicca Covens in your area via a phonebook, religious registery, or even the internet. But there are also a variety of websites online dedicated to educating and connecting Wiccans. If you are looking for someone to just talk to about Wicca and someone who could maybe help you figure out your own Wiccan path feel free to contact me: dawn@lonealaskangypsy.com anytime.
From a quick internet search, Wicca seems to be quite prevalent and common in Arizona. Incidentally, Wiccans meet in covens not "churches."
Alexandrian, founded by Alex Sanders and his wife Maxine, is an offshoot of Garnerian Wicca, founded by Gerald Gardner so the similarities are more prominent than the differences. It is difficult to write general statements about both traditions as each has covens that may practice slightly differently than other covens in their own respective traditions. Generally speaking: Both are initiatory, have 3 degrees, are considered British Traditional Wicca (BTW) and are more formal and ceremonial in nature than say, Reclaiming Wicca. Neither accept or recognize self-initiations (usually). A few differences: Alexandrians attribute the athame to air and wand to fire (Gardnerians athame = fire, wand = air), Gardnerians make more regular use of ritual nudity than Alexandrians.
In Wicca, some famous leaders were: Gerald Gardner Raymond Buckland Alex Sanders Ravan Grimassi
Short answer, yes. There is no restriction in Wicca generally regarding what you can and can't wear as long as it has some meaning to you. However certain covens might have their own restrictions that pertain to their membership.
Yes, Men can study Wicca. In fact, there is a place of honor in Wicca that can - theoretically - only be filled by a male: The High Priest. Although some Wiccan covens may be female-only, the majority welcome both male and female. Regardless of joining a coven, you can always become a "solitary" Wiccan, and study by yourself (although I really do recommend joining a local coven, or at least getting to know other solitaries).
Wicca, like many other Pagan paths does not have a government. There is no one way to practice, and although many groups have leaders within them, each group is as much different from others as it is the same.
There is no verifiable information about specific vampire covens in Salem, Oregon. Vampire covens are typically elements of folklore and fiction, rather than reality.
There are some Wiccan Traditions in which initiates to a new Degree receive a robe of a certain color as a status of their advancement. This may occur in particularly more formal covens, rather than the ecclectic Wiccan covens. Robing ceremonies aren't actually very common, except in very formulized customs. Instead advancement to a new degree is either given with a certificate, or particular medalians or emblems.