If you have signed up for your own Zoom account, there a number of settings available for the account for features like Breakout Rooms,
Many of these settings need to be managed/set from the zoom.us website and logging in there with your zoom account.
After logging in with your account the main page you land on will have information about your account, including a host key if you scroll to the bottom of the page that can be used to grant host rights to someone without giving them the name/pw for the account.
On the left hand side is also a settings link. This will open the settings menu which includes many options you can enable/disable on the account. Breakout rooms and such.