Here you can browse through different clips with instructions.
Most of them are very accessible and simple to do, even if you have little experience in dancing.
Read my article on practicing with your group.
Safety first:
The movements might be simple, but they are repetitive so after a while the strain on the body increases. The signals your get from your body are more difficult to read and/or follow up when you are moving with a group. Go for a dance that all the participants can easily do. And make sure people know they can -and should- stop when their body tells them to. No matter what sort of ceremony you’re in, they should feel absolutely free in this.