You do NOT have to create a Zoom account to participate in a Zoom meeting. If you want to host your own meetings then you will need to "sign up" for a Zoom account. But if you only want to participate in someone else's meeting then do NOT click on "Sign In" or "Sign Up", but instead click on "Join a Meeting".
If you didn't receive an email with a URL link (from someone you trust), then simply connect to the internet on your device, open up your internet browser, and enter in the URL link that you were provided. Follow the instructions on your screen. As an example, Bill's Wednesday morning 10am Bible Study on Revelation is https://us04web.zoom.us/j/396209215.
For full benefit of a video conference your device should have a working web cam, microphone, and speaker. These can either be built into your device or connected externally (plug in, cable, USB, etc). You should make sure that they work correctly before installing Zoom.