A test call feature would be helpful
A test call button would be great for first time users. Zoom has it and it helps get you set up before an important meeting.
Ron B commented
The Teams desktop app has this under Settings > Devices. (screenshot attached). Works well, like the similar setting Skype had. Strangely, the Devices option is not available under Settings if I login with a personal account but is available if I login with a O365 account.