Between Skype, Zoom and Jitsi I usually prefer Jitsi. Zoom is not bad if someone in the group to join has the enterprise version. But the free conference tool is limited to 40 minutes and Zoom may block the camera if too many people are connected. Skype meeting has many problems but is easy to set up. It is sometimes unable to recognise a camera, and some people can suddenly vanish during a call. I always try to avoid it. Jitsi does not need any server or any client (unless on mobile phone), you just ask to start a call, get a link that you send to other members. I only had problems with people using Mac/Safari with bad sound. I suspect that the speakers on a MacBook are close to the microphone and some kind of echo creates a Larsen effect.