We use Google Meet for phone calls and screen sharing. Usually, we are on a laptop and we can talk and share our screen with anybody with our Google Meet Link (you will be emailed a Google Meet link that you open in your web browser).
You choose whether to allow Google Meet to access your PC’s camera as well as your microphone. Bad hair day? Just microphone is OK :)
No downloads are required. It is very simple and free. See you there.