Hi Anas,
What is your actual question? Are you just trying to decide between using Meet, Skype or Zoom?
IMO, Meet is 100% web based, no drivers required, works on every platform using nothing but the web. It supports 100 participants (and 250 when you enable the Enterprise version which is available for free until July 1). And if you are a G Suite school you already have it. I'm not sure why you wouldn't just use that . :-/
As always though, it's FAR less about what tool you use, and FAR more about what you do with it. Teaching remotely requires a different set of strategies and expectations, and a rethinking of what and how you ask students to "do work".
Chris Betcher
Program Manager, G Suite Adoption