Help a newbie create a room with a password?

Hey! Trying to figure how to set up a “room” with a password enabled. The app looks so simple that I can’t actually see any option to do this? I want to create a room for 10-30 people and send them the password for entry. A room where we can all see each other and talk audibly. I’m hosting a cooking demo. Any help appreciated!

go to a room of your choosing e.g.
click on the icon on the bottom right which is a white circle with an I and choose add a password