Thank to you for your time and valuable feedback!

I will sure keep them in mind, currently to manage rooms, setting dates and times for meetings, send invitation mails,

I created MiroTalk WEB: https://webrtc.mirotalk.com (NB: You need a valid email to confirm before to Login),

but nothing forbids, that in the future, I can create something that interacts with external calendars and so on... :)

Thanks again and I wish you too all the best!