Sign in to Zoom (https://zoom.us/de/signin#/login) with your Zoom account.
Select "Meetings" from the menu on the left.
Now select "Private room" on the top tab.
The registration information for the Zoom meeting is summarized via the "Copy invitation" button.
Make this information available to other people, e.g. by e-mail, INCOM or Nextcloud.
Note:
After clicking on the invitation link, Zoom would like to install/open the Zoom app.
If you do not want this, select "Cancel" 2-3 times until the link "Sign in with your browser" appears.
This link will start the meeting in your browser.