If you’re soon to use your mic or computer’s camera for the first time, you might be wondering if they actually work or not. The website below can quickly test your webcam & microphone and prove to you that all is working well:
https://www.onlinemictest.com/
https://www.onlinemictest.com/webcam-test/
This site also offers other tools, for testing your speakers or keyboard, as well.