Well, much like a lot of other stuff you'll find on this website, the answer is "It depends."
Some groups practice nude, or skyclad, while others don't. It's really a matter of personal preference. If ritual nudity is something you're uncomfortable with, though, I'd strongly encourage you to ask the people in the group you're considering. If they practice skyclad, and you think that sounds terrifying, then this would not be the right group for you to join. Do Wiccans Practice Nude?
On the other hand, if you don't think being naked in front of a bunch of people is that big of a deal -- and honestly, many of us really don't think of it as a big deal -- then you should be fine. But if you're looking at a coven or group to join, you definitely need to ask them about it, and consider your own comfort level. You do, after all, have a choice about how you practice and who you practice with.
It's also important to keep in mind WHY a group or individual may choose to practice skyclad. Much like a number of other aspects of modern Pagan practice, the reasons behind an action are significant. In many traditions, the removal of clothing is the removal of a barrier between us and the divine. In other groups, being skyclad forces us to present our true selves to the gods, with no disguise or artifice. If the group you're considering does in fact practice skyclad, ask why they do so. Their answer may give you a better sense of comfort in joining them - or it may send you running in the other direction. Either way, you've made an informed decision.
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