setting up contacts

[Cheryl63]

when I set up to host a meeting, when I start listing the invitees some of them their email address is already in the system and automatically populates, but how can I add those who are not in the system how do I manage to get them to auto populate?

I have tried everything I know to do. And the website is laid out differently than what I see when I try to get into the Zoom site.