We did it as Microsoft Team because the leader was conversant with it. Skype will work just as well. There is a ‘Share desktop’ button and ‘invite more people’. What it needs is a person with the imaging / telescope equipment hooked up to a computer to offer to host and you need a group of participants to link up with. A great deal of sharing of Skype addresses is necessary.
The Microsoft Team meeting – I received an invite being a member of Monkton Stargazers and was able to use video. It was quite manageable with a dozen and we could all take our turn discussing whilst the host was operating the equipment.