Where can I find instructions on using my AirPods. They are connected. I just want the instructions for use!

https://support.apple.com/guide/iphone/control-audio-playback-on-airpods-iph06cb3316c/ios

Wow. I have some simple questions about use and there are no instructions anywhere, so let’s start with press and hold down the button on the side to change noise cancellation settings. It beeps, two different tones, which is which? And, how do I answer a call? Just say “answer?”